Hmm, let's analyze this. She knows when you've been bad or good. Knows when you're asleep or awake.
I think Yamakaze is Yandere Santa Claus.
I second the motion
She'll make a great bride...S-Sorry...! I'll go bring some more decorations, okay!I'm always watching you from the side, you know❤Commander! Do you want to decorate the tree together?So, what do you think?Papa?Cheating is bad, you know?Yeah! I'll help you!Being able to work with you, Admiral... I'm so happy...Etorofu is so diligent and cute...