Porom joins the party while Rosa has been kidnapped by Golbez. She will be the main healer until Tellah remembers all his spells. At this point, even if Tellah's white magic overshadows Porom, she will have more MP and will last longer without the need of an ether. Moreover, she is also faster than him.
Porom uses White Magic. She learns every White Magic spell in the game, although some at different levels than Rosa. Porom learns her spells in the 3D remake at the same levels as prior releases, with the exception of Mini. Porom's Cry ability makes it easier for the party to flee from battle. In the 3D remake, Cry instead lowers all enemies' defense by half. In the Complete Collection release, Cry may inflict Confuse on all foes.
Porom also can use the Twincast attack, which allows her to cast spells with her brother Palom. The two can cast Pyroblast and Comet. In the GBA and PSP versions, it will also cast Twin Meteor if they equip the Twin Stars.
Porom returns with White Magic, Cry and Twincast, which function the same way as they do in Final Fantasy IV. She joins the party at level 34 knowing all her spells up to that point from the previous game, and will continue to learn her spells at the same levels. She comes equipped with a Mythril Staff, Sage's Miter, Sage's Surplice, and Rune Armlet.
In addition to her White Magic, Porom can use Pray, a former ability of Rosa's which heals the party for a moderate amount of HP. In the Depths, it is possible to teach Dualcast to Palom, Porom, or Leonora, but only one of the three can learn it. In a flashback, both Porom and Palom retain Twincast, but during normal gameplay it is a Band ability relearned from an event in the True Moon's Subterrane.
Compared to Rosa, the game's only other dedicated White Mage, Porom has higher MP and Spirit, but her other stats are inferior. Porom also learns her White Magic at different levels than Rosa, learning some earlier than her and others later. Porom's higher Spirit and her potential to learn Dualcast make her a superior White Mage to Rosa, exchanging Rosa's offensive prowess with her bows for superior healing. However, Porom can still use Holy to function as an attacker.