Natsuya Kazumi

Trivia

 * "Natsuya" is a play on the word "natsuyasumi" (夏休み), which translates to "summer vacation", while "Kazumi" is a mixture of words "kazan" (火山), meaning "volcano", and "umi" (海), meaning "sea" or "beach", and is loosely themed on "a sea of volcanoes".