“...... ...I've... seen... this painting... A long time ago... [...] A big, warm room... Soft carpet... A family portrait... The two of them smiled... And gently... patted my head...” — Clarisse, remembering her family
Clarisse (Japanese: クライネ Kleine) is one of Eremiya's assassins and a recurring antagonistic character in an exclusive side plot in Fire Emblem: New Mystery of the Emblem primarily encompassing its sidequest chapters. Clarisse is portrayed as a loyal underling who is rarely distracted from her mission, a sharp contrast to her "sister" Reese.
Clarisse first appears in prologue 5, the chapter that begins the side plot, where she and her "brother" Legion observe the progress Reese is making on her mission. Clarisse serves as the nominal boss of chapter 3x, where she leads the forces who have cornered Wrys, telling Reese that she'll take great pleasure in killing her former companons; circumstances, however, force her to flee the battle early. Clarisse is eventually present to see off Legion's clone onto one mission, then ordered to kill Legion and his remaining clones after Legion failed another mission.
Clarisse serves as the boss of chapter 13x, where she is tasked into leading the forces taking on Marth's army in the middle of a raging blizzard. She is spotted by Athena, who apparently complicates the matter, then eventually defeated by Marth's forces. Upon her defeat, she allows Reese to help her out of the area, noting how Reese cared for her despite being treated like dirt. Reese later seeks to have Clarisse treated for her injuries, but Eremiya orders her to let Clarisse die; Clarisse finally shows her caring side as she dies by Reese's side.
Clarisse is also a playable character in a bonus mission taking place shortly after the War of Shadows, where Eremiya tasks her into taking out the remnants of the Soothsires, a group that had apparently been taken out by Marth's army during the War of Shadows. Once the mission is finished, she and Reese find themselves inside what appears to be her childhood home and briefly remembers her parents; this implies Clarisse to be the child Gharnef notes as having had a connection with the Soothsires at one point.
(Source: Fire Emblem Wiki)
