Digimon Adventure: Sora Takenouchi

Despite being somewhat of a tomboy, pursuing activities like soccer instead of more traditional pastimes like flower-arranging as her mother prefers, Sora is still a very kind-natured, protective girl who acts as a sort of "team mother". She is always looking after the others and trying to help them, even without their knowledge, and is actually so devoted to others that she develops low self-esteem over her already impressive kindness, feeling that it's not good enough to qualify as the "love" her Crest embodies, and focusing instead on her lingering resentment of her mother as a reason to disparage herself.