Melancholic Fairy Tiendora  

You dont have to spawn her. Shes allready in the big crowd of fairys. To kill her is very simple, yellow for 50 and if you can attack by range you only have to kill her. Maybe you have to run afterwards, because the fairys yell for help when theire life is low.
To kill her just go up the hill a bit to have a look at the fairys. You will see one which is much brighter in her colour than the others. target her and move as much to the spot to get her in range. Than kill her and as told you maybe have to ran away.
The only problem I got with her is that no taxidermist will take her from me to make a trophy of her :(