Sonneillon is the name of the original Demon Lord. Rain once referred to him as "Fallen Angel Sonneillon", suggesting that's how he is known in the fictional manga Black Wings, Kaminari. He and Lilith's influences have reincarnated for eons, fighting each other time immemorial.[1] He was initially killed by Lilith using the Sword of Seven Eyes.[2][3]



  1. Comment under Rain: 1345: Lore Dump, archived from the original on 8 May 2024
  2. Rain: 1345: Lore Dump#sonneillon
  3. MIS: 49: Storage#Author Notes, Lynn's transcript of the page seen in panel 6