Erika Lucifer

"As the ambassador of the Kyoto Youkai Faction, I would like to humbly introduce myself to the Great Leaders of the Three Factions - Governor General of the Fallen, Azazel, Seraph of the Angels, Michael, and the current Lucifer of the Devils, Sirzechs and the current Leviathan of the Devils, Serafall."

- Erika - beginning her introduction to Azazel, Michael, Lucifer, Serafall, and others during the meeting of the Three Factions

Erika is a young girl possessing a petite figure and is a descendant of the original Lucifer, as his Great-Granddaughter and the cousin of the current White Dragon Emperor, Vali Lucifer. She looks up to Devils, seeing them as "cool" and "strong" and sees herself as more of a Devil than a Youkai due to her lineage. She possesses a small crush on Ajuka Beelzebub due to his intellect and strength, to the point that she had developed her own Demonic Power to be similar to his Kankara Formula.

Due to the appearance of Ex, who was revealed to be the "Holy Spirit of the Bible" due to Kokabiel before his death, word had quickly reached the Kyoto Youkai Faction and when the Three Factions had reached out to one another for a meeting between the three to work out a peace treaty, the Kyoto Youkai Faction sent an ambassador, Erika Lucifer, to work out the beginnings of a peace talk between the Three Factions and the Youkai. However, the reason for wanting a peace talk between the Three Factions and the Youkai is currently unknown and is believed to only be known to Yasaka and possibly Erika, as she was the ambassador sent to the meeting.

She is a supporting character of the upcoming fanfic [Deus Vult].

Trivia

 * Her physical appearance is based off of Rem Galleu from How NOT to Summon a Demon Lord.
 * Her being part Devil was decided because Rem Galleu had the soul of a Demon Lord sealed within her body.
 * Her name of Erika means "eternal ruler" and with Lucifer which means "morning star" or "light-bringer" her name would fully translate to as "Eternal ruler of the morning star or light-bringer".