Zoey

Marie

Ignacio

Galen

Ollie

Tala

Quinn

Bodie

Teacher

British

Vampire Bodyguard

Francis

Woman

Bodyguard

The Narrator

African lady

Soft Bubbly

Southern

Robot

Hailey

French

Hood

Indian Girl Accent

A French Girl

Male Russian Accent

Irish

Akiyama Yuuki (暁山優希) is Mizuki's older sister who lives and works overseas. She is mentioned as early as SEKAI Happy New Year! when Mizuki mentions that their parents went to visit her for New Years. She is mentioned again during Secret Distance, while Mizuki is at the cursed shrine. When Kanade asks about her, Mizuki establishes that while that the two are very close, there is a notable gap in their ages. 

Akiyama Yuuki