Familiar Style
Familiar Styles are a feature added in 1.2.0. Also known as Familiar skins or Familiar Costumes.
The Familiar styles can only be unlocked on a WHIP that assigns the specific familiar.
The Requirements for getting a Familiar Style is
- Greater than 100 000 points
- Make it to the Endroom
After attaining those two requirements a 
Style Schematic will drop in the Endroom which will unlock the Familiar Style.
When the familiar style has been unlocked it can be changed at any time using the 
Small Magic Mirror
Since WHIP runs don't let the player choose their familiar they must wait until the familiar is used in a run to unlock its skin.
The different familiar styles can be found below in the gallery
Gallery
Bee Alt Attack 1
Bee Alt Attack 2
Bee Alt Idle
Chaos Spawn Alt Idle
Djinn Alt Cast
Djinn Alt Idle
Eidolon Alt Armor
Eidolon Alt Combust
Eidolon Alt Idle
Firebird Alt Attack
Firebird Alt Idle
Lesser Demon Alt Beam
Lesser Demon Alt Fidget
Lesser Demon Alt Idle
Nikko Alt Attack 1
Nikko Alt Attack 2
Nikko Alt Idle
Phoenix Alt Cast Hold
Phoenix Alt Cast
Phoenix Alt Idle
Skull Alt Blink
Skull Alt Eat
Skull Alt Idle
Skull Alt Laugh
Skull Alt Shocked
Skull Alt Spin
Skull Alt Talk
Spirit Alt Cast
Spirit Alt Idle
Sylph Alt Fidget
Thunderbird Alt Attack
Thunderbird Alt Idle