Sidian(Onyx)

He's a tall man with yellow eyes. He has white hair with black and red highlights.

Sidian overall appears to have a serious and stoic personality, hardly showing strong emotions at times, although he can still get frustrated or irritated when insulted by others, such as his fellow admin Coral. He usually obeys the orders of his superiors such as Hamber without much issues. Like Coral, Sidian can at times be less disciplined and more aggressive than his fellow admins, though less often than Coral. Sidian has a ruthless and combative disposition when operating, as seen during the siege on Diana's castle where he not only disobeyed orders to standby, but also commanded his Garganacl to indiscriminately attack and take out every Pokémon in his path by having them inflicted with Salt Cure. In Infiltrating the System! Naranja Academy in Danger! he had his Garganacl attack both a security guard and his Psyduck with Salt Cure for getting in their way.
(Making shit up) Sidian is 6'8.

Nonetheless Sidian has his own personal limits and considers even Coral's volatile actions to be reckless. Sidian is notably level-headed and calm, and because of this he often stays around Coral to keep her volatile behavior in check. In line with his level-headedness, he appears to be surprisingly honorable, as shown in A Challenge from the Explorers, politely asking Liko to be his opponent and to fight with honor, without the use of dirty or underhanded tactics. Sidian's sense of honor is further shown in Showdown! The Paldea Elite Four, telling Rika that he couldn't allow Tulip, his Tag Battle partner, to suffer to guarantee his victory, and further remarking there's no point in disgraceful victories.

He specializes in Rock-Type Pokemon. His two Pokemon are, Garganacl and Aerodactyl.