Due to her trauma, Rhyme is extremely protective over people within her vicinity, not always having any relationship to her. I imagine 1st year being hard for her 'cus she felt a self proclaimed protector over her roommates which made it hard to sleep.
A subconscious role she puts herself in, it's a way to ground herself and feed herself peace. If any of them had a nightmare, Rhyme would comfort them, and she didn't take any midnight visitors warmly. The lawless Heartslabyul was probably rough for her.












