Sealia is a female Mobian seal and a member of the Arctic Freedom Fighters. She informed the Knothole Freedom Fighters of how their group scattered following a battle with Dr. Ivo Robotnik and later assisted in destroying the Weather Annihilator. Some time later she rescued Rotor from drowning and assisted in his attempt to rescue his family from Robotnik's mind control with help from Augustus. Sealia possesses a french accent much like Antoine. (StH: #26, #32)Much later, the Arctic Freedom Fighters contacted Rotor to inform him that the herd, his family included, had been freed from Robotnik's control. Rotor lived with them for months until, once again, they suddenly fell under mind control and turned on him. Rotor very narrowly escaped; he was rescued by Sealia and the others, who watched over him as he recovered. Sealia and the other Arctic Freedom Fighters were also among those present attempting to repel the Xorda Attack on Mobius. (StH: #85, #125)
In 3237, the Arctic Freedom Fighters sent a transmission to New Mobotropolis requesting assistance; the enslaved Walrus Herd was being used to construct and guard what seemed to be a refueling station of some kind, and a local branch of the Dark Egg Legion was overseeing the operation. Deciding they needed to protect their home, the group had devised a plan of attack. Sonic eventually arrived to provide backup and was eagerly greeted by Sealia, who caught him in a tight hug. She then noticed that Rotor had not accompanied the hedgehog and was surprised, as it was his family in danger; Sonic explained that Rotor had been severely injured during the Destruction of Knothole and was no longer able to take part in field missions, earning a distraught reaction from Sealia. Nonetheless, the group soon set out to act; Sealia, along with Flip and Augustus, was given the task of attacking the underwater portion of the Dark Egg Legion's base. (StH: #215)
Upon the team's arrival near Robotnik's base, the plan was put into motion. Sonic cut a hole into the ice to allow Sealia's team access to the underwater portion of the base. She saluted Guntiver before she, Flip and Augustus entered the water. Once there, the trio was set upon by orca Legionnaires; Sealia made a show of luring one away, leaving it prone to a surprise attack courtesy of Augustus. She then ordered him to the surface to take a breath while she and Flip provided cover; however, all three found themselves the target of Grandmaster Akhlut's psychic-sonar waves. With Augustus knocked out of the fight, Sealia and Flip nonetheless attempted to fight the orca; Sealia was struck by the orca's mechanical tail followed up with a concentrated sonar blast. However, thanks to the efforts of Silver the Hedgehog, Akhlut was rendered disabled and disoriented, allowing Sealia and Flip to succeed in their team's goal; the destruction of the lower portion of the tower. Later, Sealia and the others celebrated with a meal in Iceborough. (StH: #216)
Sealia is a friendly, warm being. She has a simple, straightforward sense of bravery and decisiveness; when a situation requires her to act, she handles things in a pragmatic manner without hesitation.