The need for someone to keep the Mushroom Kingdom clean and tidy is self-explanatory: in every one of his quests of varying nobility, Super Mario leaves no block unbroken and no critter unsquashed. Nobody likes to think about the shattered, gooey remains of a red koopa troopa who was unfortunate enough to be in the path of Hurricane Mario, but the grim reality is that this plumber leaves quite a mess behind him. That’s where Eario comes in.

Keeping the kingdom’s item blocks stocked with items is no mean feat, either. If Mario happens to return to a level he’s already defeated, he’s going to expect power-ups and blocks and even enemies in the same position that he first found them. Eario would never do anything to impede Mario’s progress – he knows Mario easily defeats these enemies, and he’d surely be bored without them. This kind of responsibility requires enormous attention to detail, which makes Eario perfect for the job.

Eario is personable and unassuming, but he does not appear to have any friends or family aside from Waluigi, whose relationship with Eario is of a questionable nature. Eario idolizes Mario from afar, content to live in the shadow of this great hero. He wants nothing better than to help Mario in any way he can… from a janitorial standpoint, that is.