Judging by the reaction of the brown-haired flunky of Garma when he tried to grab Char,
Char blasted him with either something akin to the Conqueror's Haki (a concept from One Piece), Killing Intent or both. He then flung him away with Armament Haki (also a concept from One Piece).Char is Mineva's godfather
Char is the reason Dozle and Zenna met and fell for each other, and Dozle knows.