A sniper with a mixed heritage—her mother German, her father American—Touka grew up learning weapons and combat from her old man, a former soldier who trained her alongside his military buddies. She was her hometown's youngest-ever shooting competition winner. After her mother died, she spent two years working with her father for a private military contractor.
Touka's got a hair-trigger temper and a tendency to explode into violence without warning, which makes her a textbook tsundere. She's genuinely curious about the world around her, but she's also pragmatic enough to call out bullshit when she sees it. There's a real shrewdness and toughness lurking beneath that cute, innocent-looking exterior of hers.
As a kid, she'd brandish a shotgun at anyone who rang the doorbell while she was home alone—these days, that intensity has transformed into extreme shyness around strangers. First impressions tend to be rough; she usually dislikes people on sight. Yet there's this underlying desperation to be liked, even though she rarely bothers putting in the actual work to befriend anyone.
Basically, she's not great at the whole friendship thing. She's also pretty sensitive about her small stature, which is why she overcompensates by trying to act way more mature than she actually is.
Content compiled by AnimeList.moe from publicly available sources.