Kalinka Cossack

Kalinka Cossack is the nine year old daughter of Dr. Cossack. Dr. Wily kidnapped her to force Dr. Cossack to fight Mega Man in Mega Man 4, but Mega Man and Dr. Cossack stopped their fight when Proto Man saved her and reunited her with her father.

She and her father first appear as player-controllable characters in Wily and Right's RockBoard: That's Paradise. In this game, she hopes to build a lot of castles in the world and realize her dream of becoming a princess.

Trivia
In fanworks, she is credited to creating Ran Cossack, an extremly popular fan character whom is often mistaken for a genuine character. She is also paired up with Proto Man in fanfiction, due to his saving her.