User blog comment:BMHKain/SEASON IV Guessings/@comment-32691629-20170624220839/@comment-25968390-20170624224750

SHIKI is actually Roa, who took ages just to be in MELTY BLOOD but is the main antagonist of the original Tsukihime. Shiki is not a Tohno at ALL (Kishima Kouma was hired by Akiha's father (both being true Tohnos, thus being absolute monsters.) to kill the entire Nanaya clan.  Strangely, he left Shiki alone as a ravaged member.)  So Shiki Nanaya would be correct.