why did makima kill reze
Makima kills Reze in Chainsaw Man to eliminate a dangerous foreign agent and to tighten her emotional and strategic control over Denji by cutting off any chance he has at genuine love or freedom.
Story context: who Reze is
Reze is introduced as a sweet, flirtatious girl who works at a café and quickly becomes close to Denji, but she is secretly the Bomb Devil hybrid sent by a foreign country to steal Chainsaw Man’s heart.
Over the course of the Reze arc, she battles Denji brutally yet begins to develop real feelings for him, especially during their time together at the school and pool, where her loneliness and trauma mirror his.
What actually happens to Reze
After the fighting is over, Reze decides to go meet Denji at the café, essentially choosing him instead of just completing her mission or fleeing.
On her way there, Makima intercepts her in a quiet alley and kills her swiftly and without a chance to resist, a moment portrayed in both the manga and the Reze arc movie as a cold, almost silent execution.
In‑universe reasons Makima kills Reze
From a tactical standpoint, Reze is a highly trained, foreign-controlled hybrid who already tried to assassinate Denji and take his heart, so leaving her alive would be a major ongoing threat to Public Safety and Makima’s own plans.
On top of that, Makima’s power as the Control Devil is all about dominating others, and removing a powerful, independent hybrid like Reze reinforces that no one outside Makima’s system is allowed to touch Denji or interfere with her “ownership” of Chainsaw Man.
Emotional and symbolic reasons (Denji’s perspective)
Makima also kills Reze to isolate Denji emotionally: Reze is the first girl who sincerely offers him a chance to run away, live freely, and be loved as a person rather than as a weapon, which directly threatens Makima’s control.
By taking Reze out right as she chooses Denji, Makima turns what could have been Denji’s escape route into another piece of trauma, continuing her pattern of destroying everyone he could rely on or love so that he has no one left but her.
Fan and forum discussion: why it hits so hard
Fans often read Makima’s decision as deliberately cruel rather than merely “practical,” because the scene is staged like a tragic near‑miss romance where love shows up one second too late and is instantly crushed.
In many forum discussions, people argue that Makima waits until after Reze has softened toward Denji so that her death hurts him more deeply, reinforcing the idea that Makima is carefully engineering Denji’s emotional collapse, not just neutralizing a threat.
TL;DR: Makima kills Reze because she is a foreign assassin who tried to take Chainsaw Man’s heart, but just as importantly because Reze represented real love and escape for Denji—something Makima could never allow if she wanted absolute control over him.
Information gathered from public forums or data available on the internet and portrayed here.