It might not be jean one of the other cuckoos dyed her hair red so now they sport the 3 major hair colors.
Phoebe hasn't dyed her hair yet. A preview for this issue was released showing she is still has blonde hair, and Jean is in the issue with the rest of the ladies. Though, there is a cover for Uncanny (from the Feburary solicits) that has the NXS students and Phoebe has red hair. And on that note, the Cuckoos should be renamed the Powerpuff Girls. LOL
Tempest was a typo. It is Tempus. I think there is a revised cover out there with the correction.
And Irma (Mindee) is one of the Cuckoos. The one who recently dyed her hair black.
I think this is just street attire/ a look strictly for a cover. And I think that's Jean up there above Kitty and next to the other Cuckoos. Or a random red haired girl, you know how the X-Men collect those.