A player depicted with the Stargazing Hero Vanity Set.
Vanity is a wide arrangement of items which serve no other purpose than being purely cosmetic. In other words, equipping an item listed as a Vanity item (or putting armor in the Vanity slot, likewise accessories) will not grant any additional benefits to the player. In the context of the Stars Above mod, there is a total of 6 armor Vanity sets and an additional Vanity item that the player can equip. There are also items which can be equipped to the Starfarer, known as Starfarer Attire.
Starfarer Vanity
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Aside from armor that do not have any functions (i.e. Stargazing Hero's Armor), the Stars Above mod adds clothing items which dress the chosen Starfarer which are known as Starfarer Attire. Certain Starfarer Attire can benefit the chosen Starfarer as well as the player, though these require a large amount of items to craft. However, any Starfarer Attire that merely serve as Vanity do not require a precursor and can be easily crafted with 100 Stellar Remnant each.
Recipes
Below are the list of Starfarer Attire which serve only as Vanity.
Other Vanity
Excluding Starfarer Vanity, there are 5 armor Vanity sets, though the Toad Head, an extra Vanity item, does not include any other armor piece. As mentioned previously, armor listed as Vanity do not add any benefits to the player other than serving as a cosmetic item. This means the aforementioned armor Vanity sets may be worn in either the main armor slots or the Vanity slots (with the exception of Social Accessories) within the inventory menu, though this makes no difference.
Some Vanity armor sets, such as the Baseless Blade armor Vanity set, serve as a reference to other media outside of the Stars Above mod.
Recipes
Below are the armor Vanity sets listed with their crafting recipes:
Stargazing Hero's Vanity Set
This is simply a vanity set based off the design of the boss it's obtained from, who is known as The Vagrant of Space and Time.
Baseless Blade Vanity Set
The Baseless Blade Vanity Set references the clothing Senji Muramasa wears, a character from Fate/Grand Order.
Quantum Butterfly Vanity Set
The Quantum Butterfly Vanity Set references the clothing Seele wears, a character from Honkai: Star Rail.
Ocean-Hued Hunter Vanity Set
The Ocean-Hued Hunter Vanity Set references the Seaborn in the Ocean-Hued Hunter Vestments' tooltip, a race from Arknights.
Starpop Vanity Set
Toad Head