Bogroll is a twoll in the service of Stanley the Tool. He was originally a henchmanErf-b1-p004 ("the lowest henchman", according to himErf-b1-p085). Later, he was promoted to lackey in attendance on Lord Hamster.Erf-b1-p028
Bogroll is also illiterate.Erf-b1-p033
Bogroll survived a fall that killed a warlord of a much higher level than he was (such that Bogroll leveled twice). This might mean he had a relatively enormous number of hits, or that his Regeneration ability allowed him to survive being reduced to 0 hits, or simply that the warlord was injured from earlier parts of the battle.
Bogroll is, to all appearances, a simple follower. At his first appearance, he was about to become the (literal) target of a prank by one of the other henchmen. Wanda's desire to get "as far away from (him) as possible" when she encounters him holding a target-patterned parasol suggests that this is a recurring pattern.
After being promoted to lackey, he made a suit of armor for Parson and otherwise served him loyally. Parson, in contrast to the other characters, treated Bogroll with respect, something which may have influenced and inspired Bogroll's infatuation and fierce loyalty towards Parson. He is currently deceased, killed in service to Parson. The Royal Crown Coalition damaged his body to the point that Wanda claims the body cannot be decrypted.
Real World References
Bogroll is one-eyed - a reference to cyclops.
His name is a British English colloquialism for toilet paper.