Toshihiko is one of the kids at the Yomogi Nursery School where Kobato works. He's a child which kobato helps in the second episode of the anime.

At the start he was sad because his mom works always until late leaving him by himself and people talk bad about his mom and this fact. But Kobato heals his heart saying him that his mom is a good mom, and that was the only thing the child needed to hear in that moment. Toshihiko's healed heart is Kobato's second "kompeito" (the colored like-candy things that fill her bottle).