List of Forgotten OCs' Age In 2017, 2018, 2019 and 2020

1. Mei (age 12)
2. Yoseon (age 16)
3. Genesis (age 15)
4. Azure (age 12)
5. Neige (age 16)
6. Shiina (age 15)
7. Tamamo no Mae (age 18)
8. Frosty (age 12)
9. Kochiya Nasuo (age 14)

That was the character's ages in 2018, so I will show you the ages in 2017.

1. Mei (age 11)
2. Yoseon (age 15)
3. Genesis (age 14)
4. Azure (age 11)
5. Neige (age 15)
6. Shiina (age 14)
7. Tamamo no Mae (age 17)
8. Frosty (age 11)
9. Kochiya Nasuo (age 13)

Now, for how old they will be in 2019.

1. Mei (age 13)
2. Yoseon (age 17)
3. Genesis (age 16)
4. Azure (age 13)
5. Neige (age 17)
6. Shiina (age 16)
7. Tamamo no Mae (age 19)
8. Frosty (age 13)
9. Kochiya Nasuo (age 15)

How old they will be in 2020? Found out for sure.

1. Mei (age 14)
2. Yoseon (age 18)
3. Genesis (age 17)
4. Azure (age 14)
5. Neige (age 18)
6. Shiina (age 17)
7. Tamamo no Mae (age 20)
8. Frosty (age 14)
9. Kochiya Nasuo (age 16)