[Oh hey, look. Yamamoto's in the kitchen, and he's.. glowing red. And jingling. What. Though he doesn't seem too bothered by either, especially since he's singing to himself as well, in Japanese, as he bakes
a cake. Japanese traditions everywhere ahhh. Which is good because there's too much German in this place srsly]
Makkana ohanano tonakaisanwa
Itsumo minnano waraimono
Demo sono toshino Christmas no hi
Santa no ojisanwa iimashita~
[Yes, he is singing Rudolph. While glowing red. Of course he's not singing that loudly, but Yamamoto's voice actor is tone deaf. So yeah.]