This sheet will be updated as more characters get introduced.
Michael Vesperion-Kaiser father
Alicia Vesperion-Kaiser mother
Grayfia Lucifuge-Kaiser's personal maid
Isaac Phenex- family head
Zekram Bael- family head
Zeoticus Gremory-family head
Venelana Gremory- Zeoticus' wife
Zadicus Astaroth- family head
Soren Sitri- family head
Nicolas Glasya-Labolas- family head
Zeoticus Gremory
Ajuka Astaroth
Serafall Sitri
Falbium Glasya-Labolas
Morgana Lucifuge- Grayfia's mother
Albedo-rescued girl
Elysia-albedo's mother
Yasaka-lover/wife/mate and representative of youkai
Harumi- Yasaka's mother
Sainvu- servant
Fayeth Naero- elf girl Kaiser saved, future healer
5 nine-tailed foxes:
Kiyomi- 3 brown tails
Kayo- 4 black tails
Arisu- 4 white tails
Tsukiko- 4 red tails
Eiko- 3 green tails
Even though 3 out of the 4 lovers I planned for Kaiser have been already guessed/revealed, I won't write about relationship status like I did with Yasaka until they have entered a relationship in the story as well.