Midnight from My Hero Academia (Nemuri Kayama) is 30 years old at the start of the main series, with most official profiles giving her age as 30 and her birthday as March 9.

Quick Scoop: Midnight’s Age

  • Nemuri Kayama, known as the R-Rated Hero: Midnight, is listed as age 30 in character data and official-style profiles tied to the series.
  • Her birthday is March 9, which places her in her early thirties during the bulk of the story, with some fan discussions suggesting she reaches 31 as the timeline advances.

Extra Fan/Forum Talk

Fans on forums often debate whether she is 30 or 31 based on the in-universe school year and time skips, but they generally agree that she is about 30 at the series’ beginning.

Some fan wikis and community pages list her as 30–31, reflecting this small timeline ambiguity, but none place her outside the early-thirties range.

TL;DR: Midnight MHA is canonically about 30 years old, with a March 9 birthday and early-thirties age across official-style and fan sources.

Information gathered from public forums or data available on the internet and portrayed here.