In Co-op mode, Mio's stats and passive do not change.
Mio's Hyper, Magical Inferno, has a different effect in Co-op. When used, all enemies in the same uninterrupted column or row of panels as the player will instantly receive 5 damage. (In all other aspects, this Hyper functions similarly to its Normal mode counterpart.)
Mio's passive and Hyper are unchanged in Bounty Hunt mode.
Mio's base stats give her 36 starting stars and a markup of +10% at shops.