Nanjiroh Echizen / Gottis The father of Ryoma, who disappeared when Ryoma was about five years old. He is a former war hero from Wutai, known as Samurai Nanjiroh, and trained under Sumire Ryuzaki. Nanjiroh disappeared after killing Sasabe (Elder) in a battle.
"Gen" / Angel Seiichi Yukimura's right hand man, Genichirou Sanada.
Satoshi Horio / Angel A brothel manager in Wall Market; Satoshi was placed in his position by Seiichi Yukimura a year after Yukimura took over the position of Don in Wall. He is a 'small, nervously loud' man who often speaks before he thinks.
Haruka Marui / Gottis / skyindistance Bunta's 12 year old brother, traumatized after witnessing Bunta releasing his limit break on their grandfather and killing him, and because his grandfather assaulted him one time too many. Hardly ever speaks.
Shiroi Marui / Gottis Bunta's 8 year old brother, a quite disturbed boy after being brought up by parents who neglected him and after being shipped around from one town to another in less than a year, each town shabbier than the previous.
Oji / Angel An elderly weapons' maker that once lived on the beaches just north of Costa del Sol, Oji was the adoptive parent of the Kisarazu twins. He is deceased.
Watanabe Osamu / Angel A wandering chocobo rider employed to train Kenya in how to care for Merrow when he was young; also Kenya's first combat instructor. Currently MIA.
Rufus Shinra / Angel Head of ShinRa Electric Power Company; founder of the World Regenisis Organization.
Sumire Ryuzaki / Gottis A commander in the Wutai army, responsible for training Nanjiroh Echizen. (Possibly might have to be shared with Dare if she decides to take Sakuno~)
Sasabe (Elder) / Gottis He was killed by Nanjiroh Echizen.
Sasabe (The Sons) / Gottis The two sons of the deceased Sasabe wished to have revenge on Nanjiroh for the death of their father. Since Nanjiroh himself had fled, they took Nanjiroh's son Ryoma for themselves.
If you create an additional NPC or OC and wish to write a small blurb for him/her, please leave it in the comments and I'll add it to the list.