Bondrewd 「ボンドルド, Bondorudo」— is a brilliant scientist, fascinated by the mysteries of the Abyss, literally obsessed with it. The owner of the white whistle of the rank of "legend", and also responsible for the creation of the Idofront — an advanced operating point located on the fifth layer of the Abyss. In addition, he laid out a route to the sixth layer, to go to which was previously considered suicide.