Haruno has clearly
attachment disorder due to him constantly not staying in the same place, he has lost the sense of being with anyone and staying close or in the same place lost it's meaning. Knew a person like that, there's a lot of work to at least attempt to help.
Rinko having a habit of biting nails due to stress and trauma, then being depressed by their look as it's done unintentionally going down the spiral. That habit is very hard to fix, tried to make all stress go away and held hands whenever unintentionally tried to bit nails while snuggling to feel better, worked like a charm.
Koyori gives away a very disgusting sense of yandare, there goes the fluffy moments...
Thanks for scanlation!