Phaseblast: Unlike most Siren abilities, this ability is directly offensive. Rose can use Eridium to create a phaseblast similar to the one Lilith creates upon exiting her Phasewalk ability, forcing enemies away and damaging them. Should she come in contact with one of the elements, meaning fire, shock, corrosive, or slag, whilst charging herself with Eridium to be able to use the ability, her Phaseblast will be augmented with that element until the next time she charges herself with Eridium.
I'll reveal this IC
Rose was born on Pandora in the settlement of Fyrestone, which was repopulated with the defeat of Jack. Like when the first Vault Hunters came to Pandora, it remained quiet, unless a group of bandits decided to raid the place, but that's where Rose came in. It became apparent that Rose was a Siren when, after a bandit tried to kill her parents, she grew extremely angry and lost control of herself. The bandit was torn to pieces as she released her first Phaseblast ever when she was about 16. She took it upon herself to protect Fyrestone, and did so for almost ten years. When the Blightspread raged across Pandora, she was unable to protect the town. The Arid Nexus, being on top of the richest Eridium vein on Pandora, received the worst of it. Slag and liquid Eridium rained from the sky, and Rose only survived because she was charged with the falling Eridium and had become infused with the slag falling from the sky, causing her to be unharmed by it. Hyperion intervened quickly, landing a dropship near Fyrestone to pick up any survivors. Hyperion engineers in hazmat suits came to guide the only survivor into the ship, which was Rose. She was taken offworld, and left at Hyperion's survivor outpost located on Elysius, which was set up as quickly as possible to house survivors of the Blightspread. There weren't many when the whole planet went, maybe a hundred survivors total. When everything settled down and the dropships came to take the survivors where they wanted to go, Rose stayed on Elysius with about 25 other people in the settlement. This became a bit of a safe haven for those who wanted protection from bandits and the wildlife of Elysius, which was every bit as dangerous as the native predators of Pandora. Their protection was doubled up, with a Hyperion shield over the town, and a Siren to take care of anything that happens to get through. However, when rumors of the Vault on Elysius began to spread, Rose left the outpost, which came to be known as Haven, like the outpost on Pandora that was taken over by the Crimson Lance, and began her search for the Vault, hoping it contained something that could help her protect Haven even better than she already does.