|Japanese Name||非情式 レク|
|Romaji Name||Hijōshiki Reku|
|Location||Pitch Black World|
|Affiliation||Pitch Black World|
|Relatives||Roc Hijoushiki (Brother)|
Lec has raceless white skin, messy, brownish-gray hair tied into a low braid with a red bow. His bangs cover his eyes. He wears a double-breasted lab coat, black trousers with white pinstripes, and dark gray shoes; he also wears a doctor's headband with a silver crest instead of a mirror, and black gloves. Like Roc, he also has two pointed tails.
Lec appears to be calmer than his brother Roc, and is very knowledgeable, working as a doctor. Though curing diseases and fixing injuries are his specialty, he prefers to cause disease and injury.
Not much is known about his past.
Up to this day, Lec has only appeared in some of Deep-Sea Prisoner's illustrations.
Roc is Lec's brother. It's slightly implied that the two have a rocky relationship since he was once depicted eating Roc, but he still helped examine Lobco for him. Lec is the only one who can stop a rampaging Roc.
Satanick is Lec's boss.
- His name means Cruel Method / Ruthless Style (Kure (end) backwards).
- Roc and Lec have right and left motifs, respectively (Roc being right and Lec being Left). In Japanese, a common method that is taught for learning right from left is that the kanji for both include a hand "holding" something. 右 Migi (Right) holds a mouth 口. 左 Hidari (left) holds a symbol that means craft (工). With Roc his hand has a mouth on it to tie into the play on words, whereas Lec is the crafty type.