REVIEW: ‘Ultimate X-Men’ #15 - Inside The Children Of The Atom

One of the things I’ve come to expect from Ultimate X-Men is stunning artwork paired with a fresh, diverse cast—and issue #15 is no exception. With our central protagonist, Armor (Hisako), captured by the enigmatic cult known as the Children of the Atom, this chapter narrows its focus as our heroines inch closer to uncovering their enemies’ true intentions.

When issue #14 ended, we got a teasing glimpse of a new character I was eager to meet. With brown hair streaked with white and elbow-length gloves, I was convinced we were about to meet this universe’s version of Rogue. As it turns out, she goes by the name Futaba—a character who, like many in the Ultimate Universe, feels familiar yet distinctly different. Futaba is clearly a force to be reckoned with. She’s already uncovered critical information about the Children of the Atom, the existence of the Astral Plane, and something mysterious called “Project MY-X.” Whatever her full role may be, she’s not someone to overlook.

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Meanwhile, our main crew is making moves of their own. We learn that Nico has gone undercover within the Children of the Atom, posing as “Grimm”—a clever nod to her main-universe codename, Sister Grimm. Through Nico’s perspective, we gain insight into the cult’s inner workings and their disturbing plans involving Hisako, the Shadow King, and other mutants. It’s chilling to see how many people have joined the Children without realizing the twisted reality lurking beneath the surface, or the prisoners they’re using to further their hidden agenda.

One such captive appears to be Akihiro. Whether he was one of the first mutants discovered or merely the first to fall into the Children’s hands, it’s unclear. What is apparent is that he's being used—possibly as a test subject or unwilling donor. His blood or abilities may be key to how the Children manipulate or enhance the mutants under their control.

As the issue closes, Nico, Mei, Mori, and Kanon seem closer than ever to unearthing the truth behind the Children of the Atom and the larger conspiracy surrounding the mutants of Japan. But their progress raises a harrowing question: are they stepping into salvation, or into a grave?

Peach Momoko continues to deliver a visually striking and emotionally resonant story, one that speaks to the resilience of youth in the face of deep-rooted corruption. With each issue, these young X-Men evolve before our eyes, and I’m excited to see who they ultimately become.

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About Ultimate X-Men #15

Release Date: May 14, 2025

Written by: Zack Davisson, Peach Momoko

Art by: Peach Momoko

Cover by: Peach Momoko

Page Count: 26

Synopsis: A "New Age" is upon us! Witness how Hisako's journey through her inner darkness wreaks havoc on her fellow mutants and reality itself!