how old was suika when she revived senku

Suika was about 15 to 16 years old when she revived Senku. She started off being around 11 to 12 years old before the petrification event, spent about 2 to 3 years petrified herself, and then spent around 4 to 5 years working on making the revival fluid to revive Senku. The total time span from the petrification to Senku's revival was about 7 years, which means Suika was in her mid-teens at the time of Senku's revival.