After a somewhat silent walk, the two reached the nearby train station and boarded the east bound line. Katara looked through the brightly lit cabin with uncertainty, but was grateful it was empty at least due to the late evening.

"So at least this is kind of similar to what I had before." Katara said as she sat on the train seat next to Tensei.

"You had trains from where you came from?" he asked her.

"Yeah, but none were as big as this one. Usually just one or two carts that were pushed by earthbenders."

"people pushed the trains?" Tensei's mind immediately pictured Fred Flinstone as the train began moving.

"Thats right. The trains were made of rock so for a bender they simply push the rock along the track."

Tensei listened with interest to her as she explained how her home worked, people using powers for jobs just like he did. His eyes went down to the canteen she had on her waist and raised an eyebrow. "So I heard from Manual that you called him a waterbender since you saw his quirk."

Katara looked back to him and nodded, "Well, yeah. He controlled water just like I do. But… wait, why do you call them 'quirks'?"

the hero smiled and leaned forward. "Well, quirks are abilities that people have and can use. It seems you know of have four different elements and you can control one of them from where you came from, correct?"

Katara nodded again.

"Well, you seemed shocked to the chief when he walked in."

"Uh, yeah. He had an animal head!" She exclaimed, finally able to speak her mind, "I saw so many other odd things when I was in the city!"

Tensei simply laughed at her shock to the situation. "So obviously you haven't seen those kind of things before. The captain has a dog quirk, so he is obviously part dog. That means he has all the abilities a human and his animal form has together. Speed, strength and senses."

Katara tilted her head in confusion. "So… he can smell and hear as good as a dog?"

"Actually better. Anyone who specifically trains their skills can push them to unforeseen levels." He noticed Katara leaning over and staring at his backside. "Uh, something wrong?"

"You don't have like… a lemur tail or something, do you?"

Tensei burst out lauging and waved his hand at her question. "No no. Not everyone here has animal or element quirks. Some have powers to create weapons from their body or just glow. Others do things as simple as see miles away. Quirks can be anything from strength to mental powers."

Katara looked at the man next to her up and down, but couldn't see anything odd coming from him that she could tell was one. "So you have one of these… quirks?"

"Yes I do…" Tensei lifted up his arm and pointed to the golden pipes sticking out. "This is my engine quirk. It accelerates me and makes me very fast."

Her eyes widened as she stared at the metal pieces protruding out. "Wait, that's coming out of your body? I thought that was part of your armor!"

"No, its from me." He chuckled. "I have engines that come from my arms. They…" He looked at the empty train and smiled, "How about I just show you, instead."

Katara watched him stand up and walk towards the back door of the train and then turn back around. She glanced to the left down the long empty hallway and then back to him. "What are you going to do? The-

Her words stopped in her throat when she watched the thin column of flames burst out the top of his exhaust pipes and he blitzed forward through the cabin. Katara watched the blur of a man rush by her and cause a whirlwind passed her head and reach the end of the cabin in only a moment. Before she could even react, he flipped around and rushed back the other way. Her hair got whipped up and pulled by the gust following his body down the train before he skidded to a stop in front of her.

"Woah."

Tensei grinned at the one word she was able to get out. "Yes, that is my quirk."

She looked up to the smoke slowly coming out of the top and remembered the same thing when he had saved her. 'So that is how he got to us so fast. That is amazing.' she thought to herself as she straightened her loose hair. "That is a great power to have. You can move faster than anything."

"Well don't give me too much credit. I'm not near as fast as other heroes."

Katara was about to say more when she heard a voice echo through the train.

"All passengers, we are arriving in Tokyo station momentarily. Please prepare to depart."

Tensei looked up and blew out his mouth. "This is our stop. Let's get going."

"Oh, alright then." Katara stood up as well, both of them feeling the train coming to a stop. The doors opened revealing a small crowd of people preparing to board the train. While the hero and his acquaintance attempted to make their way through, many of the younger ones noticed the hero and rushed up to him in excitement.

"Woah, it's Ingenium!"

"Sir, can we get your autograph!?"

"Hey, take a picture with me!"

Tensei gave the best smile he could for all of the kids and teens that ran up to him. "I thank you all, but I really should be getting going now, actually since-

"Oh come on, please!" Some of the girls giggled out in excitement and came closer.

"Oh alright, just I can't stay long, alright?"

As the fans all cheered in excitement, Katara stood to the side speechless. This all seemed so similar to when Aang was swarmed with all those kids back on Kyoshi island when they first met. She couldn't help but giggle at his expense seeing these girls obviously crushing over him and getting closer as he tried to sign the pages they shoved in front of him. She was caught off guard though when she felt a slight tug on her robes. She turned to see a young boy smiling up at her with a giant smile.

"Uh… hi there." She smiled down at him but was confused when he handed her a notebook and a pen. "What's this for?"

"Can I get your autograph please!?" he yelled up to her.

Katara was taken back by the sudden request and stepped back slightly. "Wait, what? Why?"

"Well you are one of Ingenium's sidekicks, aren't you?"

"What? His side…" She chuckled and waved her hand. "No no, I'm not one of his sidekicks."

The boy pulled the notebook and stuck his tongue out at her. "Then you're just a stupid fan girl, aren't you?"

"I- what!?" Katara was shocked at the kids sudden attitude change as he turned around and walked away from her. "What the hell was that about?"

Tensei laughed at her expense and made his way through the fans towards her. "Don't worry about it. Many kids love heroes and don't like when people pretend to be them."

"But I'm not trying to be-

"I know I know. It's not your fault. Come on, let's get you some food. You hungry?"

Almost on hearing that, Katara's stomach growled out loud for both of them to hear. She blushed and held her abdomen. "Yeah, I guess I am."

"Well I have some ramen to cook back at my place if that is alright for you."

Katara sighed in excitement hearing a food she was definitely familiar with. "Yes that sounds amazing actually. Thank you."

"Don't mention it. I'm glad to help." Tensei nodded as they made their way through the station and out the main entrance to the street. "My place is just down the block actually, so it isn't far."

"Block? What is… oh never mind." Katara shook her head, figuring she would find out the terms and other things she kept hearing. She looked to her right and watched the different cars drive by, still getting the odd sensation firebenders would jump out at any moment. But she had to remember this place wasn't her home, and she would have to figure out how it worked until she found a way back.

Or… if she could get back.

"Katara?"

"Huh?" she looked back to him, realizing she spaced out. "I'm sorry, what was that?"

"I was saying that when we get there, we will have to introduce you to my parents to make it-

"Wait, you live with your parents?" Katara put her hands on her hips and gave a questioning look. "How old are you?"

"Easy there, captain obvious…" Tensei sneered back at her. "Yes I do live with them since our family business is being heroes. We help each other with our costumes and work on cases together, so it's easier to be close for convenience."

"Can't you just get a home right next to them and have your own space?"

"I have more than just a bedroom if you were curious. It's…" Tensei huffed and pointed to the left. "Let's just let say it's big enough."

"what do you…" She stopped walking when she saw where he pointed. "Okay, now you are just showing off."

The two of them stood in front of a large mansion that ran along most of the sidewalk they were standing on. It was three stories tall and had what looked to be a dozen room windows along the face of the building. It in fact looked like one of the large buildings she would have seen in the earth kingdom capital and yet it was where he lived. No wonder he didn't move out of his parents place. They must have been loaded!

Katara sat open mouthed as her host came by and lifted it back up. "It's just a house, nothing too special."

"Nothing special? I grew up in a block of ice and a hut." she muttered and walked alongside him to the doors.

"Hey, a home is a home." Tensei smiled and went to open up the door before pausing. "Hey, so I will be honest and say your situation is… interesting to say the least. Lets keep that stuff between us, okay?"

"What am I supposed to say then? I don't know anything of this place to lie about."

"You're an exchange student from a small village in the south and are here learning about Japan. How about that?"

She raised an eyebrow at him. "Really? Thats it?"

"You got a better idea?" Tensei unlocked the door and pushed it open.

Sighing, Katara walked in after him and was taken back by the sheer size of the entryway inside. Marble flooring shined against the faint light coming from the ceiling and illuminated the rest of the room. There were several large couches lining the walls, along with a few side tables lined with glass vases and small trinkets.

"Wow, this is amazing." she said in awe as she spun looking to everything around her.

"Yeah, they always thought the first room was the most important for an impression." Tensei sighed, obviously not impressed with his parents expensive taste. "Actually it looks like they aren't home now."

Katara looked at him in confusion. "How can you tell? The house is huge, they could be in the back."

"You see the shoe rack?" Tensei pointed to the empty stand to his left. "There are always shoes when they are home."

"Shoe rack?" She looked down and saw her shoes still on, and several small scuffs where she left marks behind her. "Oops."

Tensei smiled and waved her off. "Don't worry about it, I'll clean it in a bit. So it gives you some time to relax before having to meet them. Now let's get you that food."

After taking their shoes off, Katara followed him down one of the hallways and passed several large rooms that really caught her eyes. She wanted to see what were inside, but she respected his home and would wait for him to give her the tour. They came up to another closed door at the end of this hallway as he turned back to her.

"So this area of the house I rent from them. This is where you will be staying, alright?"

"Stay here with you?" She shifted awkwardly in place as her mind began racing. "Well I appreciate you doing this for me, but I would be intruding if I had to share a room with you."

"Don't worry, you get the spare room."

"Spare?" She questioned as he pushed the door open and was completely surprised once again. "And I thought it really would be just a room."

His "bedroom" was in fact a large and spacious living room connected to what she assumed was a kitchen due to the pots on the counter. Several couches encircled a glass table to the right in the main living room and in front of a large black picture on the wall. Behind this room she could see several other doorways leading to a few other bedrooms and what looked like a library filled with books. She couldn't help but be impressed with what she saw here.

"Okay, so this is like your own house here. I can see why you stay here."

Tensei chuckled as he removed the chest portion of his costume and set it aside. "I actually have been looking for a place of my own eventually. Since I run my own agency, I was thinking of getting a home just across from my office in Hosu. Oh, go and sit down, I'll get you something to eat."

"Thank you." Katara smiled and walked over to the couch and took a seat. She leaned back and rested her head on the soft headrest behind her, relishing in the comfort she felt like she hadn't had in weeks. Her eyes shifted back and forth through the room, taking in the nice and yet modest look he had compared to the entryway she saw just before this. Perhaps he didn't value things like money as much as others did despite obviously having a lot of it. That along with his already generous heart made her respect him even more.

"you want some juice with your food?"

Katara turned around to the sudden question. "Yeah, I would like some. Thank you." She continued to watch him as he opened up a strange metal door and inside was… everything; eggs, cheeses, meats, and multiple containers of different kind of drinks. "what is that thing?"

Tensei turned in confusion to her. "What is what?" He took note of her staring passed him to the thing behind him. "This? Uhh, you mean the fridge?"

"Yeah. You keep all of your food in that thing?"

"No, just things that need to be cold or… Wait you have never seen a fridge before?" he watched her shake her head and felt his own mouth drop slightly. "You really don't know anything about this place, do you?"

Embarrassed, Katara just rubbed the back of her head. Tensei shook his head and poured a glass of apple juice for her. "Things just get stranger with you, Katara."

She shot him a small glare. "Hey I've been here for like three hours. I haven't had much time to learn anything."

"I mean I have an entire list of encyclopedias you can go through in my office. That is bound to help you pick up plenty of things you are curious on." he paused and walked over with the glass in hand. "I'll be going back into work tomorrow, so you are welcome to use them If you want."

Smiling, Katara took the juice from him. "I really appreciate it. Thank you." She brought the juice up and took a sip. Her eyes bugged out from the amazing flavor, pulling it back and eyeing it like it was gold. "Wow, this is really good! You made this yourself?"

"Haha! I wish I could made juice. No I bought this."

"You can buy things like this? Wow, what else can you-

The sudden knocking on the entry door caught both of their attentions.

"Tensei, are you in there? I didn't hear you come home."

The new voice was male, and sounded stern yet young at the same time. "Who is that?" Katara questioned.

"Oh don't worry. That is my brother that I told you about." Tensei walked passed her and opened up the door.

"Your brother?" Katara watched as the door slid open to reveal a teenager possibly around her own age. What caught her off guard was that he looked remarkably like Tensei, only slightly shorter and with glasses in front of his eyes. She kept her eyes on him as he… seemingly talked with his hands chopping every so often.

"Brother, I didn't know you were home until I saw your boots by the door. Why didn't you come and alert me?"

"Sorry Tenya, I didn't know anyone else was home. We came in and didn't see anyone else here at the moment."

The boy Tenya leaned back to his brothers answer. "We? You are with someone else?"

"Oh yes, I'm sorry. Where are my manners." Tensei stepped out of the way and let the two teens see the other. "Katara, this is my little brother Tenya."

Tenya walked forward through the room and came to face the young waterbender. "Greetings Katara, I am Tenya Iida. Pleasure to meet your acquaintance."

Katara stifled a giggle to how proper he spoke and nodded back to him. "Hello, nice to meet you too."

"It is not often my brother brings his sidekicks home to discuss their progress. How long have you been working for him?"

"Work? Oh no, I'm not a sidekick. I just met your brother today, actually."

"What? You are not working for him?" Tenya stepped back and placed his hand on his chin. "You do not work for him, and yet you are here at his place. That means…" His eyes shot open when his mind came to a conclusion. "Brother, how could you do something so despicable!?"

"Uhh what?" Katara watched in utter confusion as the younger brother stormed back towards his sibling. "Did I miss something?"

Tenya walked right up to his big brother karate chopping the air. "Brother, I cannot believe you would stoop to this level! You can't be serious at this moment!"

"Easy Tenya, what are you trying to imply that…" Tensei's mouth dropped when he understood what was being inferred. "Oh you have got to be kidding me. Come on, you know me better than that!"

Katara was at a total loss what was going on, so she figured she might as well enjoy the juice while they argued over something.

"I understand you haven't dated in a while, Tensei, but she is far too young to be your girlfriend!"

PFFFFT!

Katara's mouthful of juice sprayed out all over the room when she heard that statement. "WHAT- *cough* WHAT THE HELL!?"

Tensei face palmed to his brother's bluntness. "Good god, Tenya… I don't know where you get these ideas from."

After the awkwardness went away (although it never really did), the three of them sat and ate the ramen together while explaining the situation to each other. The story of her being an exchange student ended up being enough for the straightforward Tenya to accept and left it at that.

"Well I must say I am terribly sorry for the off handed statement I made to the both of you." Tenya stood up and whipped his body into a deep bow. "Please accept this apology!"

"It's… it's okay. It must be odd to see your brother with a young girl in his place all of the sudden." Katara responded.

"Yeah, but how about you whisper your concern to me before blurting it out next time, alright?" Tensei glared at his sibling.

"Absolutely. I will try better next time." Tenya stood back up and smiled. "So Katara, how long do you plan to be here for your transfer study?"

She sat there for a few seconds, not sure how she was supposed to answer that before Tensei stepped in. "We are allowing her to stay as long as she needs to until she is ready to go back home." His eyes met hers and gave her a silent wink. She smiled and nodded to his answer.

"Y-yeah. Your brother is very kind for offering this to me. I hope to learn a lot."

Tenya raised his eyebrow but nodded in approval. "well I hope you enjoy your stay. And if you ever need anything, I am here to help as well."

"Thank you, Tenya. I appreciate it." Katara smiled, but then noticed the awkward look on his face when she said that. "What's wrong?"

"well, it is proper to call a person by their family name unless you are very close to them."

She blushed in embarrasment and rubbed her head. "Oh, I didn't know that. Sorry. Thank you, Iida."

Tenya nodded his head in approval. "It is no problem. Well, it is late, so I shall leave you two on your own. Have a goodnight."

"Goodnight." the two others said in unison.

After he left and closed the door behind him, Tensei rubbed his temples and laughed. "Sorry about my brother. He is quite the character sometimes."

"Oh trust me, I know exactly what you mean. I could go on for days about the things my brother has done." Katara chuckled with him as they sat there.

"Yeah, but he really is a good kid. So smart, and extremely talented too. He is already more advanced with his quirk than I was at his age."

She tilted her head in curiosity to that. "what kind of power does he have?"

He actually has the same quirk that I do; engine. The difference is that mine are in my arms and his come out of his calves."

"Really?" Katara couldn't tell due to the pants he was wearing. "Huh, that is really interesting."

Tensei yawned and glanced over to the clock on the wall. "Wow, I didn't realize it was already 9:30. I need to get to sleep soon. Come on, let me show you where you'll be staying."

"Oh, alright then." Katara stood up and followed him out of the kitchen towards the center open door of three along the wall. The room was lined floor to ceiling with books on nearly all sides and a desk to the right.

Tensei pointed in here as he continued speaking. "This is the office I told you about. You can use the books if you want to, but please don't mess with the desk and the papers. I have a few cases I'm working on."

Katara nodded to his request. "Sure, I'll remember that."

"Alrighty then. Now over here…" He shimmied passed her to the door on the right, "This will be your bedroom."

Katara walked into a decent sized bedroom with a bed, a night stand and a large cabinet with a mirror. She also noticed that the room had a doorway leading to another room, but it was dark and couldn't see much inside of it. She assumed it was a bathroom due to the sink she could see in the very faint light. "So, do you have some candles I can use for light?"

"Uhh, or you can use the light switch?" Tensei sighed and pointed to the white button on the wall.

"The what?" She eyed it for a few moments before reaching her hand and pushing it down. The next moment the lights above her flipped on, causing her to jump back a step. She stared at the bright bulbs in awe to how they glowed, reminding her of the crystal caverns under Ba Sing Se. This however was as if you took a lantern's light but removed the flame from it. It was so amazing, and yet for this place it was something so simple.

She had a lot to learn.

"If you want to wash off, I can get you some clothes you can borrow for the night. They won't fit, but they are clean at least. I can take you shopping over the next few days for your own things." Tensei said as he made his way out of the room.

Katara sat in disbelief to how generous he was. "Thank you."

Tensei simply waved his hand. "Nah, it's just some clothes. I'll put them on the bed after you get in the bathroom. Have a goodnight."

Katara watched him walk out of the room and out of sight around the corner, leaving the young waterbender alone in her room. "Goodnight."

Author notes: another one in the books! I had such a fun time writing Tenya's segment here. His personality always leads to great content.

Now just to be clear for everyone, Tensei will NOT be a romance interest for Katara. Gross.

And if this stories pacing seems slow, don't worry, it will really pick up soon. I personally never liked where 1 or 2 chapters in a fic the new character is already fully involved in the world like its second nature. I prefer a little slower burn, but trust me. this will pay off very soon.

This chapter was supposed to go on longer, but the tone shift would have made it awkward so i will save it for next week.

I hope to update weekly if I can. Stay tuned!