What is Serena age in Pokémon?

What is Serena age in Pokémon?
Serena (anime)

Serena Naosaga (治性セレナ Naosaga Serena)

Region:
Kalos

Age:
12-14

Hometown:
Asame Town (formerly) Saitama (currently)

Family:
Saki

Serena (anime)
Serena Naosaga (治性セレナ Naosaga Serena)
Region: Kalos
Age: 12-14
Hometown: Asame Town (formerly) Saitama (currently)
Family: Saki