They apparently do not get along and Sola-Ui considers Kayneth a coward for not going and attacking the opposing Masters face to face. He is engaged to Sola-Ui Nuada-Re Sophia-Ri, the daughter of the head of the spiritual evocation division, through an arranged marriage. Kayneth originally intended to summon Iskander, but with his artifact, a piece of the torn mantle of Alexander, stolen by Waver, he instead summoned the Lancer-class Servant, Diarmuid Ua Duibhne. Waver, in retaliation, stole Kayneth's artifact and entered the Fourth Holy Grail War. Kayneth decided to tear up his student's manuscript after publicly humiliating him during a lecture. Waver Velvet is one of his students, but Kayneth cares little for him, especially after reading Waver's radical thesis concerning increasing magical potential. Although the El-Melloi faction has many powerful branch families besides the Archibalds, Kayneth swept aside the competition and inherited the El-Melloi Magic Crest. He obtained the rank of Pride in his teens.

He was expected to form the greatest faction in the Clock Tower. Due to his great lineage, he had extensive connections. He was born with immense talent and rarely, if ever, encountered any hurdles in life. He has an ancient magical lineage that goes back for over nine generations.

He was the youngest lecturer to grace the podium of the Department of Evocation in its history. Kayneth demonstrated genius level talent during his time as a student. Kayneth is a very wealthy and successful nobleman, a renowned magus from the Mage's Association, the Lord of Kischur, the Department of Mineralogy at the Clock Tower, and a lecturer in Eulyphis, the Department of Spiritual Evocation.

2.3 Fate/kaleid Liner Prisma Illya Drei!.

Lord el-melloi nendoroid body