I don't think we ever talked about Usokawa, Saginuma, and Ebizawa's relationship with the kids enough. The three of them (mainly Usokawa) are actually wanted to get along with the kids. Their interactions are really adorable.
Like in ch 71, Usokawa initiated the idea to record the kids and giving them challenges to "save" their beloved nii-chan. Then in ch 131, Usokawa piped into the conversation to guess which one is Takuma and Kazuma in their baby photos. Then in ch 147, the 3 of them interacted with the kids by exchanging gifts and gave clues which followed to their secret base and literally said "you are all allies of the secret base starting today!"
There are actually a lot of moments like that, and I really think the 3 of them are underrated side characters.
