Been stuck in the suit for far, far too long?

Is it really casual if you're at a hot spring bathing yourself?

She destroyed her armor and even her suit to take a decent bath

no. she's just feeling really itchy just prior.

Trouble getting the suit off, I presume.

I can only assume that red thing next to her is her hair tie (and the artist says as such), but it sure doesn't look like one.