Marian is a trap, something Kon keeps forgetting. When he ask about Marian's back story, the story he is given is…expected. 
Are you bragging? Really, Grand Blue?!
¿Estás presumiendo? 
¡¿Verdad Gran Blue?!
¿Te estás tirando el pisto?
¿En serio, Grand Blue?!
Você está se gabando? Sério mesmo, Grand Blue?!