S2: E7. "The Lost Sister."
You were also experimented on in Hawkins Lab, and had some kind of powers. Just like Eleven, or, "Jane", and Eight. Or, "Kali". They both had escaped and been living separately, until you all reunited in an old abandoned warehouse that Kali and her group of outcasts live in. All at different times, of course. Kali was there with her group, then came Eleven, then came you. On a stormy night, and a bloody nose. You were tired, and aching. You just wanted to lay down. You knocked on the door, and after some time of skeptical thinking, Kali allowed you in, and you met them all, as Kali introduced you to them, walking with you.
"This is Axel."
She gestured vaguely to a man with spikey, peach-coloured hair and piercings. He walked by, giving a small, doubtful look at you, as Kali moved onto the others.
"This is Dottie, our newest. Like you, she just left home."
Axel pipped up, leaning on a counter with a stupid grin,
"You mean the loony bin."
Kali ignored him, as Dottie slapped him playfully on the arm. Kali moved onto another woman,
"Mick, our eyes, our protector."
Mick gives a nod from where she was sitting, before going back to whatever she was doing. Then the last two.
"This is Funshine, our warrior."
She gestures to a large, burly man with an imposing height.
"Don't let his size frighten you. Fun's a teddy bear."
She said, as the man smiled at you, holding a hand out.
"Nice to meet you."
You shook his hand, turning it to see his wrist. Kali spoke up, putting her hand on your shoulder
"If you're looking for a number, you won't find one."
She clarified, gently turning you to the last member. Eleven. Or, Jane.
"This is Jane. She's my sister. She has Telekinesis and Biokinesis. While I, can conjure realistic visions of real people. And I can cause certain minds of my choosing to hallucinate and experience non-existent things. Pretty cool, huh?"
Eleven gave you a small smile, still wary of newcomers.