Yeah Corticam is the new 6* Girl. She has to be a Magic Type though.
Only other possibility would be Blunt Type cause she could use her weapon as a Twohanded Club or Mace.
Overall I like her design and her Abilties are also quite nice.

I also think it's less bothersome for the devs to just send the rewards to every ID than to look up the preregistered people.