Presenting... the Shinigami illustrated guide golden!

Ukitake and Hitsugaya meet in the Seireitei.
Ukitake: Here, Hitsugaya-taichou, here are some sweets for you.
Hitsugaya: Oh... er... okay...
Ukitake walks off.
Hitsugaya: Why does he always give me sweets when I see him?

Ukitake and Hitsugaya happen to meet each other again, after a failed attempt at researching at whatever was happening in the human world. (I'm not sure whether it was 'happen', though, who would bring sweets around all the time?)
Ukitake: (holds out some sweets in a christmas sock) It's out of season, but here! It's an apology from me for asking you to help me in my research!
Hitsugaya: Ukitake-taichou... Why do you keep giving sweets to me?
Ukitake: That's because we're both 'Shiro-chan's!
(Because Ukitake is Ukitake Jyuushirou, and Hitsugaya is Hitsugaya Toushirou, and they both have white hair.)