As you probably know, eggs are something of a popular motif for Easter. As a symbol of life they represent* the mythical resurrection of that ol' Jesusface of Nazareth** - and two millenia later this bit of avian symbolism was transmuted into an excuse to stuff our faces with chocolate every year, flimsily justified by the sweetmeats' ovoid shape. Where rabbits fit into all this is quite beyond me, but I'm not about to complain about this holiday because A: I rather like chocolate, and B: I once got Pokemon Blue as an Easter gift (still haven't caught 'em all).
Anyway, in the spirit of the holiday Myuphrid decides to become even more far removed from the metaphor and paint the nearest egg-shaped object in garish Easter egg-style colours. The fact that said egg-shaped object is a heavily-armed warbot who isn't terribly enthusiastic about the scheme (but apparently was willing to stay still long enough to be thusly painted) doesn't seem to have dampened his festive spirit at all. Perhaps his bunny-ear headband is too tight and is constricting his brain - better than it constantly slipping down his head, though.

_{*Possibly. Maybe. I don't know, ask a theologist.
**Because apparently Jehovah is oviparous or something - or maybe Jesus was actually pupating and they mistook the remains of his cocoon for eggshell.}