Would love to see Emma Frost as a character.
Love the idea of psychic characters and have some cool ideas for an Emma Frost character.
As a psychic, possibly reducing stun duration and decreasing critical chance of opponent. This mode would be focused on attack rather than defence. Maybe her attacks in this mode can be energy based?? Obviously high special damage as a mutant.
Then a second fighting mode, (like how Nightcrawler can switch fighting modes) where she goes into diamond form, including adding armour buffs and maybe bleed immunity, but possibly nerfing other abilities so she's not OP. Take away buffs added by psychic form as Emma cannot access her psychic abilities in diamond form.