There are currently ten playable characters (called valkyries) with a unique starting loadouts. (Five were added in the Overdrive update.) Except Rún and Sanngriðr, Each character can unlock a starting ultimate and secondary Abilities:
Secondary ability: defeat Nidhogg with that character on any difficulty.
Ultimate ability: defeat Nidhogg with that character on Hard.
Fading: Loses 1HP every quarter beat (dies after 55 seconds if idle at starting HP)
Gains 5HP every time you shoot an enemy
Shotgun-type weapons heal Skuld for each pellet. For example, "Shotgun Pistol" heals her for ~25 hp per shot.
Skuld is healed for 50 HP when entering new stage. Health starts ticking down after a name of stage disappears.
Currently there's a bug - if you use "Quest" then you get strange healing that drastically decreases fading damage. If you have Gunnr's Bracer then you will regenerate slightly instead of taking damage. It lasts until you enter the next stage.
Circlet of the Serpentine will override Skuld's innate healing, drastically reducing the amount of healing she recieves.
Having any amount of shield will prevent death from the fading health loss. (Potential bug?)
Uses coins instead of HP and shields. Taking damage will make you lose half of your coins (if odd then rounded down) no matter how small damage was.
If you buy something and your money will be set to 0 then you will die. Line will be "Killed by - A lack of coins".
When you use Damocles' sword for Coin Bag - you will at first get these coins and after that take damage and lose half of your new stock.
Lion Heart won't save you - it will say that you died to lack of coins. However, if you die without Lion Heart then it will say name of enemy.
Skjaldmeyjar's Plate won't prevent you from losing money nor lessen the amount lost.
Because of not having hp, healing, hp increase and shields are useless, much as items like Dragon's Skin.
Acquiring the Banking ability allows you to have as much "health" as coins stored in your bank across all your runs, as the ability allows you to instantly withdraw if you're low.
Rún
Rún
HP: Random
Armor: Random
Starting weapon: Random
Ultimate: Random
Secondary: Random
How to unlock: Spend 1000 coins in the armoury
Starts each run with all atributes randomed:
Any weapon (can get high-tier weapons such as Raygun) + 1 random item in random slot (Only the ones that are spawning in The Well Room).
0-2 random abilities. Can also randomly get Odr's dash ability "Dash/Fly" (doesn't prevent you from getting other abilities) and other character's unique abilities.
0-100 hp (0-75 of them can be empty), 0-100 shield (if he has 0 max hp then he will have at least 25 shield)
Jarnbjorn
Fire Bolt
Freyr's Blessing
Block
Hermóðr's Enchantment
Odin's Blessing
Valkyrie's Veil
Barter
Teleport
Mortal Curse
Gunnr's Bracer then you will regenerate slightly instead of taking damage. It lasts until you enter the next stage.
Circlet of the Serpentine will override Skuld's innate healing, drastically reducing the amount of healing she recieves.
.
Lion Heart won't save you - it will say that you died to lack of coins. However, if you die without 
Skjaldmeyjar's Plate won't prevent you from losing money nor lessen the amount lost.
Dragon's Skin.
