^
<3
If anything, I find it quaintly in mis-happenstance that the wielder of the aspect is lethargic; having gotten so bored of being expected to be jolly and involved constantly...or at least, this the personality assumption Keepa had foist upon them, for lack of any actual explanation, otherwise. Either way, whether or not its a means to tease him about his state or to reassure him of the joy his aspect is meant to bring, the name-based teasing exist. 
I mean, wouldn't you? If "Santa" exists, wouldn't you cling to it, in the right mindset?

*shrug*
Maybe its just the unpredictability that is Keepa.
(Or maybe I'm making mountains of anthills. Idk, but I'm rolling with it)

Edit: May be rewinding that last bit of my post for the sake of character interaction.