Bhasvod is a prelate--a San'Shyuum who underwent physical augmentations to be faster and stronger than their physically frail counterparts. He was a member of the assassin group Silent Shadow, serving under the Prophet of Truth. During the Great Schism, Bhasvod aided in the secrect evacuation of High Charity's remaining San'Shyuum, headed for the shield world Cloister.
Bhasvod followed Truth to the Ark, where he and the remaining Covenant loyalist prepared for the ring's firing to begin the Great Journey. After Truth was assassinated, the loyalists slowly came to realize that he failed in his endeavor. Bhasvod rallied the remaining Covenant forces to the downed keyship Anodyne Spirit, killing anyone who doubted their faith in the process.
Bhasvod and the loyalists would remain on the Ark for several years, their numbers having dwindled too much to successfully leave the Ark or make repairs to the keyship. Eventually, they learned that the Ark was repairing itself.
In 2559, the Banished arrived at the Ark on a salvage mission to aquire a slipspace shard that was believed to still be on the Anodyne Spirit. They were attacked by the loyalists but managed to steal the slipspace shard.
When the Keepers of the One Freedom arrived on the Ark to fire the Halo array, their leader, Castor, formed an alliance with Bhasvod due to their unified goal, although their trust was thin. The UNSC presence on the Ark learned of this plan through spies within Castor's ranks, and mobilized to stop him.
Along the way, Castor learned the truth of the Halos and betrayed Bhasvod, allowing the UNSC to bombard their location and prevent them from firing the array. Bhasvod survived the attack but was once again forced to retreat, waiting until the right moment to take the slipspace shard back and open a portal to Cloister. He remains on the heavily-contested Ark.