This is a very nice idea!
Penn is a very animated person who loves all things comic books. She can't help but drop references to things she enjoys like comics, movies, shows, stories, etc when she speaks/thinks. She's a bit of a hot-head and is quick to bicker--especially with Jack (the person she doesn't even realize she has a thing for yet. lol.). But at her core, she's a good person with a strong sense of morality/responsibility which is what makes her a good superhero!
Aryan is a dragon Janus that has lived for over a 1000 years, and was the familiar to the goddess of flame and retribution, Neri. However, his age in the form of appearance is around 26-28 years old. (I realize that's a specific range, but that's what it is. Lol.) He is very snarky and is quick to get defensive. He doesn't trust anyone easily, and when he does trust you, he is fiercely loyal. He is also very strong and has various abilities that help him and Samara throughout their journey together!