Let's see:

Leon(Squall)
Yuffie
Aerith
Cloud
Sephiroth
Cid
Wakka
Tidus
Selphie
Setzer
Rai(Raijin)
Fuu(Fujin)
Yuna
Rikku
Paine
Auron
Seifer
Tifa
Vivi

If you want, you can count the Moogles which brings the count to: 20 (only 20??!)

FQ...