Hayden Romero:
Kira Yukimura is your older sister by two years.
Tracy Stewart:
Theo Raeken is your older brother by a year.
Malia Tate/Hale:
Lydia Martin is your 'twin' sister but you both don't exactly are alike that much.
Kira Yukimura:
Allison Argent is your 'twin' sister.