User blog comment:Xilinoc/Ch. 607 - THE MASTER/@comment-24153155-20141128031045/@comment-11051098-20141128145158

Ichibei could have been loathed if he was one of the original 13 captains when Yamamoto founded the Gotei 13. Yhwach described the first generation as a band of killers, perhaps Ichibei was a fallen monk or something who was quite brutal in his way of being, making others loath him.