Need a summoner name for a girl

Don't.

Having a gender identifier is asking for trolls to abuse you, especially in low elo.

Just do what you like.

Alas. This question is too open-ended and comes across sounding a little bit sexist. I have no idea what your friend thinks is kawai'i but here are some ideas to prime your creativity. Skittlefig Gummy Tart Ickle Pickle

Dunksanna Pwngaurd