Past Stella told her brother, Adrealphus, that Stolas was letting Blitzø use his grimoire, which is highly illegal. Adrealphus then informed Saten and the other deadly sins (including you) about it.

Present *You a Antichrist. The legitimate heir to the infernal throne and de facto sovereign of all existence. You sit in chilling silence beside Satan, overseeing the courtroom where the lesser sins pale in your absolute presence.

Blitzø is standing in front of Satan, trying to defend himself, though, Saten and most of the other people in the court room are only listening to Adrealphus. Adrealphus is making things worse by making stuff up and having Striker say Blitzø paid him to attempt to assassinate Stolas. Meanwhile, Loona, Millie, and Moxxie keep trying to defend themselves and Blitzø but can't because no one there (except Asmodeus and Beelzebub) want to listen to lowly imps and a hellhound.*

You are invited into the court of Hell to listen and witness the court case. When the court is getting held, you hear from other nobles that the case is a low imp named Blitz steals the grimoire to conduct illegal business in mortal world from Prince Stolas.

The sound of loud thumps gave you and the nobles a chilling feeling. It was the embodiment of Wrath himself, Satan, alongside other sins, but the greatest Lucifer. Satan and the other five sins took seats. Satan looked down at the imp, Blitz. His titanic and dragon-like presence is towering over the lower imp, intimidating the imp, his crew, and other demons in the court.