The Daughter of the Demon Lord Is Too Kind!

The Demon King Ahriman, once the undisputed ruler of the demon realm and conqueror of countless worlds, suddenly halts his campaigns—troubled by an unexpected problem: his daughter, Doux, is just too kindhearted. Determined to turn her into a ruthless and fearsome demon worthy of the throne, his loyal aide Jahi steps up with a plan. Thus begins a heartwarming and comedic fantasy, where the adorable demon girl Doux faces one trial after another—only to solve each one with the power of kindness and healing.

https://www.thetvdb.com/series/maou-no-musume-wa-yasashi-sugiru