@Neko Majin C
As part of tempest shadow also known as fizzle-pop berry-twist got her horn back but didn’t erase her eye scar while being alicornified got payback against princess twilight sparkle while giving luster dawn a lesson on FIM in twilight’s castle in front of the stained glass designs of flurry heart and twilight when tempest shadow comes up behind princess twilight sparkle and wing slaps her in the flank.
As part of tempest shadow also known as fizzle-pop berry-twist got her horn back but didn’t erase her eye scar while being alicornified got payback against princess twilight sparkle while giving luster dawn a lesson on FIM in twilight’s castle in front of the stained glass designs of flurry heart and twilight when tempest shadow comes up behind princess twilight sparkle and wing slaps her in the flank.
Celestia retained her universal spanking rights even after she retired.
The real power remains with her.
I would also say that Tempest kept her scar reminding other troops that scars can make you though and strong.
She decided to keep it because Twilight thinks it’s cool.