what did stan mean when he said I dont understand right after kimiko talked

Stan likely meant he was genuinely confused or didn’t know how to react after Kimiko spoke. In The Boys , that kind of line usually signals that he either missed her point, was surprised she could speak, or was thrown off by how unexpectedly serious the moment felt.

Most likely read

• He didn’t understand the emotional meaning of what she said.
• He may have been caught off guard because Kimiko speaking is treated as a big moment in the show.

• It can also mean he was confused about why she said it right then or what it changed in the conversation.

In context

Because Kimiko’s speech is such a notable shift in her character, “I don’t understand” reads less like a literal language issue and more like Stan being puzzled by the significance of the moment. The show often uses short lines like that to show a character is processing something bigger than the words themselves.

Another possible meaning

• He may have been testing her reaction.
• He may have been hiding what he really understood.
• He may simply have been written to sound cold and detached in a tense scene.

TL;DR: Stan probably meant he was confused by the moment, not just the words — especially because Kimiko talking is a major emotional beat in the story.