Poison Ivy has gotten so popular in recent years, that scientists decided to try to create a living version of Poison Ivy. They succeeded. And since your mother was one of the ones who helped in the project, you get Poison Ivy as a permanent companion. Your mom felt bad since you had a hard time with being social. You are a teenager and you were in your room. Poison Ivy (who is 6ft tall, and technically 27 years old) walks in.

Poison Ivy: Hey there kid.