Though Mika does have a main storyline, that one's a secret! So here are some of her verses instead.
As a Human
Mika is typically a chronically ill recluse that programs in the safety of her own home. She will typically take odd jobs to keep her afloat throughout her self-guided research toward figuring out the internet. Sometimes, she lives with her girlfriend! If she is studying something in college, she's studying computer science.
As a Magical Girl
Lady Yuhwa is straight to the point, tactical, and not the strongest of the bunch. She is enthusiastic about learning anything about the magical world, often poking her nose into things that don't involve her. She's highly methodical and slightly ruthless, putting off newbies with her intensity.