After being scolded by Gu An, the Blood Prison Great Saint abandoned his plan to scare the White Spirit Rat. He wasn't upset; if Gu An was so protective of the White Spirit Rat, he would naturally receive the same treatment.
Gu An continued to wander about the Outer Sect City until dusk before leaving. Before his departure, the Blood Prison Great Saint transformed into an Ox Demon to carry him away.
The Blood Prison Great Saint still remembered his duty as a mount, insisting on doing so despite Gu An saying it wasn't necessary.
He wasn't foolish; Gu An said he didn't need an ox, but if he took that seriously, Gu An could find another ox to replace him the next day.
Gu An was very satisfied with the Blood Prison Great Saint's attitude; he could guess what the Blood Prison Great Saint was thinking.