Humans / celestial humans
Lucy
Yukino
Juvia
Laki
Erza
Aska
Alzack
Bismuth
...

Mermaids
Levy
Mavis
Mirajane
Elfman
Lissana
Evergreen(every green is more like a fairy than a mermaid)
...

Vampires
Gajeel
Natsu
Jellal
Gray
Lyon
Most of the fairytail guild

Werewolves
Most of lamia scale
Mermaid heel

Celestial spirits

The celestial spirits