Kaibara Haruki

Kaibara Haruki (海原ハルキ) is a secondary character in the D4DJ franchise.

Description
Haruki is a well-known DJ who used to be part of a group alongside Kofune Ryujin, Mitsuhashi Ku, and Inuyose Dennojo. He often looks after his niece Michiru who is also a DJ.

Etymology
Kaibara (海原) translates to ocean, but can also be split into two parts. Kai (海), which means sea, and Bara (原), which means original.

Haruki (ハルキ) has no meaning as it's katakana but can have several kanji representations.