Yeap. Mike trying to pretend to be a normal person with formal clothes and very approoriate beautiful haircut (that Charlie did for him hihihi)
In his defensive, he'll use that for jobs interview (which I got inspired by movie Mike's outfit for his job interview) and school events like a play or something. Besides he needs to show how normal and likeable to people, imagine people knowing hes a dead man/zombie who has no social cue and only talks to a mysterious jester plushie! Hahaha hes just a guy!!
The Marionette, after giving life to five kids, raising them by themself, killing anyone who hurts them, and also gives cryptic messages to those who listen: