Love settings like this where the wards of Tokyo take on such extreme personalities and insanity. I wanna see Nakano or Akiba or Jimbocho in this world lol.
Reindeer guy has got a severe case of "Notice-me-senpaitis".
Poor lad is desperate for attention from our boy Sanda; it's a combination of him being an attention whore, being used to people fawning over him and his life purpose as a reindeer for Santa being denied by this lanky boi.