A small child wanting his mother was a subject too close to Kubo's heart not to affect him intensely at any point in time.

He could hold the conflicting feeling of missing his own mother alongside amusement at the little boy's source of frustration, and so his chuckle only had a slight hitch of emotional compromise.

"Wow, she must be smart. We should probably go get her then," he suggested. He hadn't seen a grown woman in the hall lately, so he held out his hand. Even if this child was someone he knew shifting through time as he was, it was impossible for him to leave even a temporary child alone and missing their mother, with Too Many Feelings building. "How about it, do you want to help me find her?"