Supergirl is in the cover photo for a reason. She's gonna be a part of this story. How to involve her in the universe of Flash and Arrow is not easy to plan, but I'm doing my best.

"Humanity has always feared what it doesn't understand" - Ian McKellen, X-Men

Kara was sitting down on the couch all by herself staring at the television, which isn't even on. She couldn't take her mind off the time Mon-El kissed her. She knows it means he's into her, but she didn't think she was. She likes him as a friend, but considering his way with girls, she didn't feel like she wants to take that chance. Besides, she still has feelings for James Olsen. However, they can't be together because of her life as Supergirl.

Her contemplation was interrupted when Alex opened the door.

"You left the door open," said Alex.

"My bad," replied Kara.

"Something bothering you?" asked Alex. "And don't deny it. I can tell."

"Mon-El... kissed me," confessed Kara.

"And that bothers you, why?" asked Alex.

"You know how he is with girls. I'm not gonna be another victim of his boyish charms," said Kara. "But it's also got me thinking about my love life."

"You're not planning on giving up, are you?" asked Alex.

"Honestly, Alex, I don't know," said Kara. "Adam. Winn. James. This love stuff is really complicated."

"What about the other guy you met? Barry, is it?" questioned Alex. "I heard about him on the news. Winn told me you two were pretty close."

"I was using him to make Jimmy jealous," said Kara, just in case Alex was thinking she was into Barry.

"Did he know that?" asked Alex.

"No, he did not," answered Kara. "But he's just a friend. We bonded over the fact that we're both superheroes and facing some difficult times. Nothing more. Besides, he's from another Earth. Did Winn tell you about that?"

"Yes, he did," answered Alex. "Considering aliens and metahumans exist, it doesn't exactly sound far-fetched."

"I do miss him," said Kara. "He kinda reminded me of myself."

"Winn told me you have to travel fast to open a breach," said Alex. "Why can't you try it?"

"Because this Earth is my home," said Kara. "I'm not leaving anyone just for some guy. Besides, I don't have feelings for him. I was already into James. And also, he's probably seeing somebody else."

"Why don't you give Mon-El a chance?" said Alex. "Sure, he can be a dirtbag at times, but maybe you can change that."

"Just because Lillian is behind bars, doesn't mean Cadmus is giving up," said Kara, changing the subject. "We have to stop them and save dad. I can't think about boys right now."

Alex rolls her eyes.

"I think I'm gonna go flying," said Kara. "I need to clear my head."

"Sounds like you need to punch something," said Alex. "If you're lucky, there might be a mugging."

"If I need to punch something, I'd punch your face," joked Kara.

Kara puts on her suit and flies out of the apartment.

As Supergirl flew around the city, she kept her Super Hearing on just in case of an actual mugging or a robbery. She was just simply enjoying the flight, trying to free her mind of worry. As she did some tricks in the air, she heard something.

"Kara! Kara!"

"Winn," said Supergirl, recognizing the voice.

Supergirl flies to the direction of the voice. She crashes through the roof of an abandoned warehouse and saw Winn sitting on the floor tied up.

"Hi," greeted Winn in a normal way.

"Uh, hi," greeted Kara, confused. "You sounded like you were in trouble."

"I am in trouble," said Winn, still acting casual. He turns his head and says, "Say hi, Siobhan."

"Siobhan?" Supergirl was surprised at the mention of the name.

Coming out of the shadows and into the light is Siobhan Smythe, a.k.a. Silver Banshee. Kara was shocked to see her, since she was supposed to be locked up in the NCPD prison.

"How did you get out?" asked Supergirl.

"I had a little help," answered Silver Banshee. "Don't know who, don't care. All I care about is getting my revenge on you... Kara Danvers."

Kara's eyes widened, shocked that Siobhan knows who she is.

"H-How..." she wondered.

"My rescuer gave me some helpful information," said Silver Banshee.

"One question," interrupted Winn. "Why not just expose her?"

"Because it won't matter," said Silver Banshee. "Sure, everyone will know who she is, but does that mean she'll stop putting on the cape? I thought it's best if I just use you to get to her and end this fast. Afterwards, I can go find Cat Grant and make her pay."

"Not while I'm standing," replied Supergirl.

"That can be arranged," said Silver Banshee.

Silver Banshee unleashes her sonic scream, forcing Supergirl to fly out of the way of the blast. Winn couldn't cover his ears because his hands were tied.

"Siobhan, please, stop," pleaded Winn.

"Siobhan's not here anymore," replied the villainess angrily. "There is only Silver Banshee."

Supergirl charges at Silver Banshee swiftly and pushes her towards a wall. Just as Siobhan picks herself up, Supergirl unties Winn.

"Get out of here," said Supergirl.

"I can get through to her," said Winn.

"You already tried," said Supergirl. "It didn't work. Winn, I know you liked her, but she's long gone. Just go."

"Just don't hurt her... too much," pleaded Winn before leaving the warehouse.

However, Silver Banshee started screaming again, causing Winn to shut his ears while collapsing to the floor. Supergirl's ears begin to bleed.

"Call Alex," ordered Supergirl.

"Siobhan smashed my phone," said Winn, still covering his ears.

"You're not getting out of here anyway," said Silver Banshee.

"It's not like you have someone waiting outside," said Supergirl. "I know, because I don't hear anyone outside."

Silver Banshee simply kicks a generator, turning it on. The warehouse suddenly becomes covered in an green electric force field.

"My mysterious rescuer supplied me with more than just information," said Silver Banshee.

All of a sudden, Supergirl started to feel weak. She started to feel woozy before she drops to her knees.

"Feel familiar?" said Silver Banshee. "This machine is powered by Kryptonite. You didn't think I'd be stupid to be caught unprepared. I know you can beat me, so I brought a little game changer."

Silver Banshee smacks Supergirl across the face before kicking her to the ground. Supergirl tries to get up, but Silver Banshee kicks her in the stomach. Kara clutches her stomach in pain, too hurt to stand up. Silver Banshee unleashes another sonic scream. Supergirl tried to close her ears, but it was no use. Suddenly, Silver Banshee gets him in the head with a tin can, causing her to stop. It was Winn.

"Sorry," apologized Winn.

Silver Banshee walks towards Winn, but before she can hurt him, someone punched her from behind. Silver Banshee turns around and sees Supergirl, barely keeping herself standing. One smack across the face knocks Supergirl back a few feet away.

Winn was gonna help, but stopped. He knew Siobhan can beat him easily. He looks back at the Kryptonite-powered machine. He lets Supergirl and Silver Banshee fight while he sneaks around to get to the machine. On the way, he found a hammer. He reaches the machine and continuously hits it with the hammer, destroying it and shutting down the force field.

Silver Banshee throws another punch, but Supergirl stops it by catching it. She started squeezing and Silver Banshee begins to show the expression of pain. Supergirl unleashes a punch that knocks Silver Banshee to the wall, knocking her out.

"Thanks, Winn," said Supergirl.

"You're welcome," replied Winn. "Well, what now? Obviously, we can't take her back to the NCPD. She know who you are."

"We'll take her to the DEO," said Supergirl. "After we lock her up, we have to find out who freed her."

We haven't seen the last of Supergirl. When she'll go to Earth-1 is gonna have to wait. I hope this was entertaining.