The character design of Spoiler:Asriel, as depicted during the Pacifist Route's final battle, appears to draw heavily from Sariel, the final boss of the 1996 game Touhou Rei'iden: The Highly Responsive to Prayers. Both characters' names can be read as anagrams of one another and draw from archangels in Abrahamic mythology: Spoiler:Azrael is the Islamic archangel of death and is named in the apocryphal Apocalypse of Peter as an avenger of the wronged, while the Judaic archangel Sariel is mentioned in the apocryphal 1 Enoch 20:6 (under the Ethiopic rendering "Saraqâêl") as "set over the spirits, who sin in the spirit." Additionally, both characters feature a predominantly white color scheme save for a long robe with a white symbol on it; as Toriel's version of this robe is deep purple, like Sariel's, it is consequently implied that Spoiler:Asriel's robe is the same color.