What's Isokal's mother's name?

According to the development of the game plot, we can know that Isocar's mother is the twin sister of the queen today, and her name is Angelia.

Isokal is a character in the game The Fifth Personality. He is an undertaker and a survivor. He not only has an amazing face value, but also uses powerful "burial" skills to help his teammates come back to life.