TW: S*icidal ideation
I'm not sure if this is a popular opinion, but personally, I think Uika’s self-hatred, depression, and s*icidal urges are chronic and deeply buried rather than impulsive. Honestly, from watching the anime, her depression feels so quiet and subtle that she might even feel she's not worth the effort of taking her own life... Just as she said she wanted to find peace, I feel like it mostly shows up in everyday self-neglect, where she just doesn't treat herself with any care.