Though she never met him directly until Luceti, Marco is one of the most important figures in her life. He and the Whitebeard Pirates have been protecting her and everyone else on her island for years. He is a major reason why Keimi wasn't stuffed into a fish bowl a long time ago. Or worse. For that alone, she has a deep amount of admiration and respect for him. On a more personal level, Marco is a big softie and a total derp and Keimi loves him to death for it. Though Marco is clearly capable of taking care of himself, she can't help but enjoy taking care of him and Ace. They're her boys, whether they like it or not. Though she hopes they do.