Koge Donbo

Di Gi Charat (a.k.a. Dejiko) - along with Petit Charat (a.k.a. Puchiko) and Gema - travels to Earth as part of her training to become a full-fledged princess. They crash on a small town in Japan, where they meet the Omocha brothers (who spend most of their time thinking how cute Puchiko is) and Mr. & Mrs. Ankoro (an elderly couple that makes Japanese sweets). (myanimelist.net)

Higuchi Kotarou was just a normal sixth-grader until he gets a new next-door neighbor - an insanely perky angel named Misha that has made it her life's work to make Kotarou happy! And if that weren't enough, Misha has an even stranger roommate - a kind-hearted demon named Shia and her mysterious black cat Nyaa! If Kotarou's life at home is this weird.. what can it possibly be like at school?! (myanimelist.net)