Marvel Ultimate Alliance 3 (ocs reader)

6 girls named Sylina, Tyra, Maia, Priya, Rhea, and Stella are sisters from outer space in the known universe, and are titled princesses/guardians of the infinity stones.

Sylina is the eldest of the six, and princess/guardian of the space stone. Tyra is the smart yet geeky one of the sisters, and princess/guardian of the time stone. Maia is the calmest of the sisters, and princess/guardian of the mind stone. Priya is the rebellious one of the sisters, and princess/guardian of the power stone. Rhea is the gothic and mystic one of the sisters, and princess/guardian of the reality stone. Stella is the youngest and shyest of the sisters, and princess/guardian of the soul stone.

The six sisters may have different powers, but they have one thing in common. They have been tasked to protect the infinity stones from being fallen into the wrong hands of Thanos and The Black Order.

But when the six sisters are planning to retrieve the stones from the Kree and kept them away from The Black Order, they were interrupted by a group of bounty hunters/heroes known as The Guardians of the Galaxy. After the battle, The Guardians accidentally scatter the infinity stones across the world and 5 of the princesses/guardians along with them, leaving Sylina the only one left and ended up in Earth with The Guardians.

Now, Sylina and The Guardians must find and retrieve the infinity stones and her sisters from Earth's most dangerous villains with the help of an unlikely alliance of the planet's mightiest heroes in the world.