Manatsu is an extremely energetic and motivated 1st year middle school student who moved from Minamino Island to Aozora City. She always acts before she thinks, and in any situation Manatsu says "I'll do what's important, right now!". Manatsu's most precious item is the lipstick her mother had given her. Her catchphrase is "It's tropical~!". Manatsu transforms into Cure Summer, and her charm point is her lips.