Behind them is the Beast Clan. The Beast Clan is a group that has always been misunderstood. They are often mistaken by mortals for the Demon Clan due to their massive bodies, immense strength, and extraordinary mana. In reality, while there is some overlap between the two, they are different clans.
The Beast Clan is arranged at the back mainly because of their large size. In fact, the leaders of the Beast Clan can control their body size, but the entire clan views bigness as beauty, so they refuse to make themselves smaller. Placing them at the back effectively prevents crowding and trampling.