Odesse is an Agarthan Dark Bishop with the power to summon Flying Demonic Beasts. After the fall of Shambhala and the death of most of Those who Slither in the Dark, Odesse accompanies the newly reborn Nemesis and the reanimated Ten Elites on their vengeful crusade towards Garreg Mach Monastery, along with a platoon of surviving Agarthans.
At the start of the final battle, he watches one his soldiers die after attempting to traverse Lamine's poisonous swamp, warning the rest of his soldiers to avoid the swamp at all costs. Should he be approached, he will summon Flying Demonic Beasts to his position. If defeated, the remaining Agarthans will flee from the battlefield.
- Odesse is the only named Agarthan to not be fought on any route besides Verdant Wind.