Dio is quite standoffish to people and pokemon she doesn't know. She's also very proud, and not afraid to get into a fight if she feels it necessary. She's still ticked at Hermione's Hisuian Buisel for beating her up when she'd just been enjoying a river swim in Hisui.

Hermione caught Dio in an act of rescuing her from a Hisuian Buisel who had roughed her up. Hermione then went on to catch the Buisel as the only way to stop it from attacking. Dio evolved while Hermione was still in Hisui, being one of only 2 pokemon she could actually use there.

Poison Sting, Spikes, Pin Missile, Barb Barrage, Water Pulse, Dark Pulse, Poison Jab