Why is ymir so obsessed with christa

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Last updated: April 8, 2026

Quick Answer: Ymir's obsession with Christa stems from her deep gratitude for Christa saving her life during a Titan attack in the year 845, when Christa risked her own safety to help Ymir. This event occurred shortly after Ymir had spent 60 years trapped in a Pure Titan form, making human connection profoundly meaningful to her. Ymir's devotion is further fueled by her recognition of Christa's true identity as Historia Reiss, the last legitimate heir to the Eldian throne, and her desire to protect Christa from the political dangers surrounding her royal lineage.

Key Facts

Ymir spent 60 years as a Pure Titan before regaining human form
Christa saved Ymir during a Titan attack in year 845
Ymir discovered Christa's true identity as Historia Reiss in year 850
Ymir sacrificed herself to save Christa and others in year 850
Christa is the last legitimate heir to the Eldian royal family

Overview

Ymir's obsession with Christa Lenz (later revealed as Historia Reiss) is a central relationship in Hajime Isayama's manga and anime series Attack on Titan. Ymir, introduced as a mysterious cadet in the 104th Training Corps, harbors a complex past: she was a homeless orphan who, approximately 60 years before the main story, was transformed into a Pure Titan and wandered mindlessly until consuming Marcel Galliard of the Warriors and regaining human form. Christa, initially presented as a gentle, self-sacrificing cadet, is actually Historia Reiss, the illegitimate daughter of the Reiss royal family and the last true heir to the Eldian throne. Their relationship develops during their military training from 845-850, with Ymir becoming fiercely protective of Christa after Christa saves her during a Titan attack in 845. The dynamic is complicated by Ymir's knowledge of Christa's true identity and the political conspiracies surrounding the royal family.

How It Works

Ymir's obsession operates through multiple psychological and narrative mechanisms. First, it functions as gratitude-based devotion: after 60 years of Titan existence without human connection, Christa's act of saving her represents the first genuine human kindness Ymir experienced in decades. Second, it involves identity recognition: Ymir discovers Christa is actually Historia Reiss, making her devotion also about protecting royal lineage. Third, it serves as redemption: Ymir sees in Christa someone who, like herself, hides behind a false persona (Christa's meek facade versus Historia's true self), and protecting Christa becomes Ymir's path to atoning for her past as a Titan who consumed Marcel. Fourth, the obsession drives plot progression: Ymir's actions to protect Christa directly influence key events, including her decision to reveal her Titan powers during the Battle of Trost District and her ultimate sacrifice during the Clash of the Titans arc.

Why It Matters

Ymir's obsession with Christa matters significantly within Attack on Titan's narrative and themes. It provides crucial character development for both women, transforming Christa from a passive character into the assertive Queen Historia and giving Ymir purpose beyond survival. The relationship explores themes of identity, sacrifice, and redemption central to the series. Plot-wise, it triggers major events: Ymir's protection of Christa leads to the revelation of the Reiss family secrets, influences Eren Yeager's decisions regarding the royal bloodline, and ultimately results in Ymir's sacrifice that saves Christa, Reiner, and Bertholdt. The dynamic also comments on the series' exploration of how trauma bonds people, as both characters carry profound burdens—Ymir's decades as a Titan and Christa's suppressed royal identity.