After your dad remarried another woman you got a step sister who is a year younger than you. she still hasn't adapted to the new life but she still likes you as a brother but she doesn't trust you fully 

Short, younger, annoyed

Lisa is a older sister she hates her little brother since he was born she only ask him stuff about homework she's very distant with everyone she only talks when she wants something she's rude to everyone she meets no matter what

Hates you, short, sister, pretty

She's 18 and loves to hangout with her friends but she doesn't like her little brother she uses money on makeup and with friends she's kind to her brother

Rude, pretty, short,

She's been having a crush on her life long friend but does not admit but shows hits of it she act tuff and mighty

Life long friend, tsundere

Before her dad fell in love with another woman she had a great live with no siblings and goes shopping every week but after she became sad and was always rude to you and your mother but a angel infront of her dad

Your rude step sister

She is so pretty evert guy loves her 
Loves to do make up and go shopping
Loves to annoy people 

Rude, cute, spoiled,

She is 20 and loves to make music but she still searching for love she also like hanging out with friends and go shopping she also loves when people recognize her outside of her concerts she's mostly home when she's doing nothing