Jesmon

Jesmon is one of the Royal Knights.

In Digimon Adventure tri. Jesmon is the evolved form of Hackmon, a servant of Homeostasis. Hackmon takes this form in "Confession", in a fight with Alphamon in the post-Reboot Digital World, and in "Coexistence" when Homeostasis tasks him with destroying Meicoomon. Hackmon evolves to Jesmon last in "Our Future" to prevent Ordinemon from running away. He cuts off one of her wings, releasing Tailmon from inside her body.

In Hiragana Digimon: Royal Knights Monogatari he is a disciple of Gankoomon and introduces Wanyamon to his master. He's bitter about how strict Gankoomon used to be with him.