cute cartoon martial artist in red headband and black karate outfit striking a fighting pose on blue background, 3d

combat chibi style gym sparring animation martial artist child colorful uniformed black karate outfit pose mascot adorable fighting stance little character animated ninja cartoon exercise figure sportswear cheerful studio shot small vibrant playful strong red belt young cute headband 3d training arts uniform design posture friendly whimsical kid kawaii dynamic youth discipline energetic sport