I’ll—I Mean... We’ll Protect You

With the God of Death visiting them and with him telling everyone the situation the Kingdom of Gehenna was in, even the angels found it unbelievable that that was happening under his jurisdiction.

Zen was abusing his powers as the king and had disturbed the peace the kingdom has because he had been killing demons in order for him to maintain his power.

He stole his power by getting their souls and he wanted more by obtaining his son's body--wanting to kill the Almighty Seraphim, along with their children who bore both demonic and angelic powers. 

Ava then told them the situation of the Kingdom of Gehenna more as the night went on, making everyone listen to her every word as they conversed and planned among each other on how to meet Blanc and on how to separate Zen's soul from Blanc's body.