He is tiny. The asylum guard attire is too big for him as a result.
As the son of a great professional minigolf player he wants to be just like his dad but he kind of has no talent and is really just a wannabe minigolf professional. He admits to standing on top of boxes sometimes just to feel as big as his dad. He even carries the precious minigolf club he gave him before he died around with him everywhere.He is also afraid of heights and deep waters.
All we know is that he works at Dr. Marcel's Asylum as a guard and grew up in the shadow of his father and has been neglected in favor of his older brother.