A full Milio skin gallery, plus the practical point: some skins change the silhouette enough to matter in a fight.
Before the cosmetics: Milio is a support at 525 attack range whose job is to make somebody else win a lane, then convert map presence into objectives.

Milio has 3 skins, excluding chromas. The art below is the in-client splash.
Skins change no numbers. They are not therefore free of consequence — a skin that alters the silhouette or recolours an ability changes how quickly an opponent reads what you just cast.
That cuts both ways, and it is the honest reason some players keep the base skin on champions they take seriously.
Milio's abilities enchant allies on touch, making their next damage deal a burst of extra damage and burn the target.
Kick a ball that knocks back an enemy. The ball launches upward on hit and falls toward the enemy, damaging and slowing enemies in the area upon impact.
Create an empowering zone that heals allies and increases attack range to those inside. The zone follows the ally nearest to the cast point.
Milio tosses a shield to an ally, temporarily increasing their movement speed. This ability has 2 charges.
Milio unleashes a wave of soothing flames that heal and remove crowd control effects from allies in range.
Milio is a warmhearted boy from Ixtal who has, despite his young age, mastered the fire axiom and discovered something new: soothing fire. With this newfound power, Milio plans to help his family escape their exile by joining the Yun Tal—just like his grandmother once did. Having traveled through the Ixtal jungles to the capital of Ixaocan, Milio now prepares to face the Vidalion and join the Yun Tal, unaware of the trials—and dangers—that await him.
Skins are tied to the account, not to you. Anything bought on a smurf stays on the smurf — worth knowing before spending real money on one.
Full Milio page — abilities, stats and every skin →