This is one of the many crossover ideas in my head that comes from watching various Super Sentai seasons. And it just so happens that Ryusoulger happens to fall on Shinkenger's 10 year anniversary. Since there isn't going to be a 10 anniversary movie, might as well have this crossover. It is also posted on AO3.


"…ninety-seven, ninety-eight, ninety-nine, one hundred!" A little girl no older than ten dropped her practice katana in relief. But her mentor/mother's dissatisfaction was evident in her frown, making the girl drop her head.

"Hiromi, your strokes towards the end were getting sloppy. Redo the last twenty."

The girl winced at the order. Her arm muscles were screaming at her and she has been training since dawn. Thankfully, her savior came in the form of her father who showed up to check on them.

"Kaoru, she's been training since early this morning and she's clearly tired. Why don't you let her make it up tomorrow?" He tentatively suggested. "And it's getting late. You and Takeru-sama are going to visit your grandparent's grave early in the morning."

The 18th head of the Shiba clan pursed her lips in displeasure but turned to her daughter with a stern look. "Do twenty extra strokes tomorrow. I expect them to be done when I return from visiting your great-grandparents."

"Yes mother." Hiromi said straightened but her tone indicated she was sulking. Kaoru shaked her head and went back inside. Her husband remained outside with Hiromi and gave her a sympathetic smile.

"You've been improving a lot, and your mother is hard on you because, well, it's the only way she knows." He offered her a hopeless smile.

Hiromi let out a huffed and stormed inside the house, leaving her father to sigh heavily. He wished his wife would understand that their daughter is not her mother. Kaoru's childhood suffered because of the Gedoshuu and mastering the sealing character. But Hiromi didn't need to worry about those things so Kaoru had no reason to be harsh on her daughter. Sadly, Kaoru's upbringing meant she didn't see any other way to train her daughter other than the way she was brought up. Hopefully Kaoru would see that before she drove Hiromi away to the point of no return.


The next morning at the crack of dawn, Kaoru and her company arrived at the graveyard, Takeru was there with Hikoma. The two men gave her respectful bows and made their way together to the area reserved for the Shiba clan, Takeru and Kaoru in front while the rest remained at a respectable distance behind them.

"You seem troubled, mother." Takeru spoke up when he noticed Kaoru was deep in thought.

Kaoru let out a small sigh and shake of her head. "It's nothing. I'm just worried about Hiromi and her future as a Samurai and head of the Shiba Clan. She is not taking it seriously."

"I'm sure she will be fine. Chiaki turned out fine despite his loose Samurai training."

"I know." Kaoru managed a small smile at the thought of the Wood Samurai. He was the least trained when they first started being Shinkengers, but in the end, his skills improved leaps and bounds by the time they fought Doukoku. "But Hiromi is not a wood samurai. She is a fire samurai and a Shiba."

Takeru quirked an eyebrow at her. "She deserves to have a normal childhood, not one where becoming a Samurai is more important than enjoying life. You and I went through that because defeating Doukoku is the only thing we could think of. But Hiromi doesn't have to go through that. We defeated the Gedoshuu so that our next generation no longer has to go through that dangerous life."

"I know that you are right. But there is a part of me that needs her to be ready to fight. Even with the Gedoshuu gone, there will always be something to threaten Earth, the Zangyack for example. I want her to be ready to face those threats so that she can be safe."

"Hm." Takeru was not entirely happy with her response but said no more about it as they have arrived at Kaoru's grandparent's gravestones. Takeru and Kaoru were no longer surprised that like every other year though, the graves and its surroundings were already cleaned and flowers were left in front of the gravestones.

"Again? Who has been visiting them before us?" Hikoma wondered out loud.

"I am not particularly disturbed." Kaoru blinked as the Kuroko handed some incense. "If grandfather and grandmother are visited by people who still respect them, I see no reason to chase them down, especially if they clearly do not wish to show themselves to us."

"But for them to do this consistently for thirty years, they must have been very close to your grandparents." Takeru remarked.

"I'm just glad that there are still people who care for them." Kaoru smiled lightly.

Unbeknown to them, two of the Ryusoulgers were watching them from a distance and after a few minutes, the one in black walked away with the green following closely behind.


"Senri-san's granddaughter really takes after her." Towa remarked once they left the graveyard and walked back to the town.

"Yes." Bamba nodded in agreement. "The resemblance is striking. Personality wise, I think she resembles Yojiro more."

Towa snorted at that. "All Shiba heads are like that, serious and stoic. By the way, are we never going to show ourselves to them?"

"It's for the best. There will be questions we cannot answer without giving away the Ryusoul people's longevity."

Towa hummed in agreement, understanding his brother's logic. If they had remained watching the Shibas a few minutes longer, they would have realized that they were not the only ones watching the family but with nefarious intent.


Hiromi huffed as she made her way into the forest to play with her new friend while her mother was visiting her grandparent's graves. For the past few weeks, she had been slipping out to meet up with her unusual friend, the Kishiryu Chibigaroo.

How did this start? Well, it all began one day when Hiromi stormed into the forest following a disagreement with her mother and she came upon the young Kishiryu who's first reaction was to punch her and she retaliated by hitting him with a branch like it was her training sword. Ever since then, their strange friendship was born.

"Hey hey hey! Hiromi, you're late!" Chibigaroo complained when she wiggled into the clearing that was their meet up spot.

"Sorry. I couldn't get away until mother left." Hiromi shrugged off her backpack and grinned at the smallest Kishiryu. She swung a branch she picked up along the way at him which he dodged and Chibigaroo retaliated with a punch of its own. Thus their play fights started and ended with them rolling around in glee.

"This is fun." Hiromi sighed as she cleaned up in a stream.

"Yup. But I got to go soon. Dad wants me to meet up with Koh and the others to train next." Chibigaroo said as he splashed around in the water.

"Hm, being a Kishiryu has a lot of duties, just like being a Samurai." Hiromi remarked offhandedly. Staring at the sky in thought, she asked her friend a question that has been on the back of her mind for a while. "Hey Chibigaroo? Is your dad proud of you?"

"Hm?" Chibigaroo looked at his friend weirdly. "Why are you asking that?"

"Just curious. You are one of the Kishiryus and you regularly fight alongside the Ryusoulgers. Is your dad proud of your accomplishments?"

"Yup, he is. He lets me know that all the time. He even praises me after every time we fight the Minosaur."

"Lucky you." Hiromi huffed under her breath. "Mother only sees my faults and shortcomings whenever I train."

"Oh." Chibigaroo lowered his head. But he suddenly tilted his head and dipped it apologetically. "Sorry, I got to head back now. My dad's calling for me."

Realizing the time as well, Hiromi scrambled out of the stream as well. "I need to go too! Mom is going to be mad! I haven't done my strokes yet!"

Bidding each other goodbye, the two parted ways with Hiromi running back. She was so dead if her mom already got back and found out that not only did she not do her strokes, she also snuck out to play. Arriving back at the manor, she attempted to get back to her room by climbing the tree beside the manor.

"You don't have to worry about your mother catching you sneaking out."

Hiromi nearly slipped and clung on the tree trunk tightly. She sighed in relief when she saw it was only her father. Sliding down the trunk, she gave him a pleading look. "I wasn't doing anything bad, I promise."

Her father only chuckled and led her to the veranda, waving at a kuroko to bring some water. "I knew you were sneaking out for some time. So where were you?"

"I…I was meeting with a friend." Hiromi ducked her head sheepishly at be caught.

"A friend." Her father hummed. "Alright. I won't say a word of this to your mother. It's good that you can make friends, as long as they are good people. Anyway, you better to your strokes. Your mother and Takeru-sama were delayed coming back because of a monster attack."

"Are they alright?" Hiromi asked worriedly.

"They are fine. They were in the wrong place at the wrong time when a monster started attacking. And you know them, needing to help civilians. But the Ryusoulgers thankfully appeared and took care of the monster, especially after it grew big."

Hiromi nodded and took her wooded sword to start practicing before her mother returned. Now she guessed this was why Chibigaroo needed to leave suddenly. She hoped her friend was alright after the fight and will try to find footage of the monster and mecha fight.


An hour ago

After paying their respects, Takeru and Kaoru planned to walk around the town for a bit before heading back to the manor. They did not expect to come across one of the Minosaurs rampaging around the park, terrorizing the civilians.

"Separate…Seperate!" The cupid like minosaur was firing arrows at the terrified people running away. Those that were hit cried out in pain, clutching their chest over their hearts.

"What's happening to the people?" Kaoru narrowed her eyes as she and Takeru materialized their Shinkenmarus while the Kuroko, Tanba and Jii evacuated the people. The two Samurais deflected all the arrows directed at them. Then the foot soldiers showed up and the Shiba heads fought them off. They were different from the Nanashi, but equally troublesome and they can't get close to the monster.

Takeru's eyes narrowed when he saw green light float out of a young boy not too far away from them and into the Minosaur. "What…?"

Just then, the red, pink, and blue Ryusoulgers he's heard about leapt into the foray. They gave him and his mother questioning looks but thankfully decided the Minosaur was their priority. Some of the foot soldiers broke away to engage with the Ryusoulgers instead, giving him an opening to make their way to the boy who was now pale and panting heavily, and there was a weird green mushroom monster taunting him. For some reason, with each taunt, more green lights floated to the monster who got stronger and the boy grew weaker. There was not a doubt that he needed to get the green mushroom away from the boy and fast.

"…so lame. Your parents are separating because you can't keep them together." The green mushroom taunted. Takeru saw red and didn't hesitate to slice through the monster with his flaming Shinkenmaru. He did not expect another sword to slice through the green monster, from the blue Ryusoulger at that. He can tell the Ryusoulger was surprised with his actions but turned his attention to the boy as more green lights floated out. This time however, it only made the Minosaur grow bigger.

"This is bad." The blue ryusoulger frowned under his helmet as he checked on the boy who was now looking very sick. "Please help him get to safety." He addressed Takeru. "We need to defeat the Minosaur before he dies."

Takeru's eyes widened at his words but before he could ask further, the blue ryusoulger flicked open a blue key and threw it towards the triceratops mecha, making it combine with the red tyrannosaurus and draw him inside. Takeru quickly scooped up the boy and made his way to Kaoru and the others who have taken shelter in an underground parking lot.

"What's wrong with the boy?" Kaoru frowned in concern when Takeru came over with the boy limp in his arms.

"I am not too sure. But I think whenever he has these…negative emotions, they power up the monster and it is also draining him at the same time. The blue Ryusoulger said that he will die if they do not defeat it soon." He explained as he carefully handed the boy over to her. "I'm going to watch them. If they cannot handle it, I will go out in the Mougyuu Dai-Oh."

Kaoru frowned at him but nodded curtly. "Be careful." She was not going to stop him, not when the life of the boy was on the line, even if it is inappropriate to fight the current Rangers' battles. Hopefully the Ryusoulgers will not need him to step in. It would be an insult to them and imply that they are too weak to handle their own battles. But as one of the past sentai teams and samurai, their duty is to protect people, not the pride of other teams.

Much to Takeru's relief, his intervention was not needed. Though the Ryusoulger's mecha struggled to keep up with the Minosaur's speed at first, once they summoned the green kangaroo/dinosaur/boxer, the fight became one sided in the Ryusoulger's favor and they managed to destroy it within less than five minutes.

The Ryusoulgers have indeed earned their place as the 43th sentai team, considering they finished the battle with only half the team present, Takeru thought with a small smile as he made his way back inside and to his mother. Much to his relief, the boy was now looking better with color back on his face. Kaoru gave him a small nod and gave the boy presumably to a couple who were franticly checking over him and apologizing profusely to him for the pain their separation caused. His smile widened as he came up beside his mother.

"I'm glad for him. Hopefully his parents will reconsider their decision for separation." He remarked to her who smiled in agreement.

"I agree." Sighing, she glanced at her watch and frowned. "I need to go back now and check on Hiromi. I don't trust her to actually do her training before sneaking out again."

"Princess, why haven't you stopped her from doing it? If it were up to me-Ack!" Tanba complained, only to earn a swat from Kaoru's fan.

"That is not something for you to intervene with. I will confront her about this, eventually."

Takeru and Jii exchanged looks, wondering Kaoru's reasons for not disciplining Hiromi when the girl has been sneaking out. Then again, Kaoru has been the most difficult person to understand, even to Takeru.