Uchi no ko (うちの子, lit. "my child") is a Japanese tag which is used for original character illustrations. Original characters are created by artists themselves, who choose not only the design but also the character's personality. It's easy to grow attached to one's original characters, to the point of considering them your own babies! Plus, it's very nice when other people grow attached to your character after seeing your illustrations.
Today we collected a number of illustration tagged uchi no ko, characters created by pixiv artists and, we're sure, very much loved! Enjoy!