So, when the last name isn't given, that's because it's the last name of an OS character. Last name given = completely original family tree. Characters appear in order of age ca. 2025.
Kaleo (25; graduate student in marine biology; 5'6", black hair, amber eyes, tan; Japanese, Welsh, French, Native Hawaiian, and Spanish heritage)
Fujiwara,
Akane (25; singer/ dancer; 5'7", light purple hair, crimson eyes, tan; Japanese)
Motosuwa,
Hyun (21; junior engineering major; 5'9", brown hair, brown eyes, tan; Japanese/ Korean)
Hikaru (20; sophmore art major (photography); 5'10", brown hair, blue eyes, medium skin tone; Japanese)
Yumi (20; senior history major; 5'6", dark brown hair, indigo eyes, medium skin tone; Japanese)
Ai (20; actress/ model; 5'6", black hair, violet eyes, pale; Japanese)
Midori (20; sophmore psychology major; 5'3", dark green hair, hazel eyes, medium skin tone; Japanese)
Shin (18; freshman music major (piano); 5'6", silver hair, teal eyes; Japanese)
Akira (14; freshman in highschool, president of the Astronomy Club; 5'5", black hair, crimson eyes, pale; Japanese)