The red cape DOES NOT COME WITH THIS MOD. You will need to download Cloaks of Skyrim SSE. I personally use "Cape - Red Linen" in the images above.


HOW TO GET THE SUIT:
There are TWO types of Supergirl Costumes:

Supergirl's Armored Suit and Armored Boots. It's classified as Leather armor and can be created at any blacksmith forge.
The armor suit and boots can be upgraded with ONE Steel Ingot each.

Supergirl's Suit and Boots. It's classified as Clothing but still has the same appearance as the light armor version. It can be created at the tanning rack.

I made a clothing version just for fun, mainly just getting some practice with using the Creation Kit. You can use the clothing version to play as a magic-user Supergirl.
You need easy-to-find basic materials in order to craft the suit and boots.

Materials are: some Leather, some Leather Strips, Blue Mountain Flower, Red Mountain Flower, and some Tundra Cotton for the cloth version.
Tundra cotton is easily found around and near the Honningbrew Meadery south of Whiterun.
If you want the suit or ingredients immediately, then go get it using console commands.
I did not make a red cape. There are some great cape mods out there you can use. I specifically use "Cape - Red Linen" from Cloaks of Skyrim.

This armor is ONLY FOR FEMALE CHARACTERS.

INSTALLATION:
I personally use Mod Organizer 2 to download almost everything. It will work with Vortex too. Just go to the download page and install using your preferred mod manager.
After it downloads, activate the mod and start playing.

MANUAL:
place the textures folder and "Standalone Supergirl Suit.esp" into the DATA folder. It is always located in your Skyrim Special Edition Installation folder.
Make sure the plug in "Standalone Supergirl Suit.esp" is checked.