A character whose original design was of the Knight classed classmate of Bernadette (<- totally forgot a clue about his name...) from SDE.

His design was shifted after I reimagined a deceased character into his adult form. That was where the black hair and red bang came from.
If anyone watched Sousei no Omnyoji or Twin Star Exorcists should know one character who died at the Kegare Corruption Incident that has this design.

Anyways, like Serene, his surname was taken from a jar that contains a name, where his surname and Serene's was taken from:

Perfetti van Melle

(July 11 2019: Wrote this even though tomorrow is the first prelim exam...)