Nia Liston: The Merciless Maiden is a tV series anime that premiered in fall 2026, produced by KONAMI animation.

About the production: the story comes from a light novel, there are 25 episodes of about 24 minutes and its current status is "airing".

Its main genres are action and fantasy, with themes such as Female Protagonist, Reincarnation, Magic and Age Regression.

On AniList, Nia Liston: The Merciless Maiden has an average score of 75%, a very good score, and appears on 29,363 users' lists.

A great hero lies undefeated on her deathbed, regretting that she never found a foe who could take her down. She never intended to meet her fate anywhere other than on the battlefield, and her peaceful demise has her wishing desperately that things could have been different... But when she suddenly comes to in the body of the young, frail Nia Liston, she’s got an all-new fight ahead of her. Nia is a sickly child, meaning she has a long way to go before she’s in fighting form. Now that she’s been given a second shot at life, however, she’s determined to get what she wants. She’s going to live—and die—for battle this time! Make way for the Merciless Maiden! (Source: J-Novel Club)

Official synopsis from AniList.