Aries:

gets annoyed easily by their sibling
lots of arguments but-when they're in a good mood they treat their siblings to a meal or spend lots of quality time with them

Taurus:

has lots of patiencedoes their siblings chores if they're asked nicelyis admired/looked up to by their siblings

Gemini:

tries everything new with their sibling
is really kind and understanding towards themcan also be really cruel and petty if they're annoyed at their sibling

Cancer:

gets really hurt when their sibling doesn't make them feel loves
wants their siblings attention majority of the timewhen they're not in a good mood they don't want to even talk to their siblings

Leo:

blames their siblings for everything
says they are the only one who can bully their sibling and confronts anyone else who thinks otherwiselikes to tease their siblings over embarrassing memories

Virgo:

their siblings are jealous of them bc they're the most loved child
rarely shares their own private life with their siblingbond over small inside jokes

Libra:

teaches their sibling how to be trendy
is always asking their sibling for favours but also returns them holds long grudges

Scorpio:

surprisingly don't fight a lot with their siblingsbut when they get into an argument it gets serious and a bit physical
still loves their sibling a lot even if they don't show it

Sagittarius:

is really reliable but can sometimes be a bit too childishhates being clingy with their siblingdoesn't get angry at their sibling, only disappointed

Capricorn:

is basically a counsellor to their siblings
acts like they don't like their siblings but actually loves themthe "mum" of all the siblings

Aquarius:

always too busy to spend time with their sibling ignores them most of the timebut when they hang out its really fun

Pisces:

always gets into trouble even if its their siblings fault
still takes responsibility for it because they're the most mature onein the end they still get along with their sibling more than the rest of their family and friends