Suika is generally estimated to be in her mid‑teens (around 15–17 years old) when she finally revives Senku, based on timeline clues from the manga and fan breakdowns.

How fans get that age

  • Suika is introduced as about 9–11 years old before the big time skips, according to guide info and wiki-style profiles.
  • After the second global petrification, she wakes up alone a few years later, then spends several more years learning to make revival fluid in Brazil.
  • Discussion threads that track the in‑story years say it takes about 7 years total from the second petrification until she revives Senku.

Putting this together, most readers conclude she goes from roughly 9–11 to somewhere in the 15–17 range when she pours the revival fluid on Senku.

Why you’ll see different numbers

  • Some fans assume she was 11 at the last clearly stated point, then add the full 7 years and call her 18.
  • Others subtract the period she is also petrified (about 2–3 years) and land closer to 15–16.
  • Official material focuses on the “several years later” phrasing rather than a specific number, so all exact ages are fan calculations, not a hard canon age.

In current forum and social media discussions, the most common “headline” answer is that Suika is a late teen by the time she revives Senku, even though people still argue whether it’s 16, 17, or 18.

TL;DR: Suika doesn’t get an explicit canon number in that scene, but timeline math and fan debates place her roughly mid‑teens, often cited as around 16–18 when she revives Senku.

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