For a long time, Tempest is distressed in her new Equestria home. Her life goal as the Storm King’s loyal advisor was to get her horn back. Not only is that chance gone, the ponies of Equestria, even with their all powerful magic, aren’t able to restore her horn either. She seeks a lot of comfort from Twilight, who she lives with for a few months while she gets situated in Equestrian society again. Even though there’s nothing Twilight can do to get her horn back, she reassures Tempest that her magic is still very powerful.
Tempest’s magic is still there, it just has nothing to channel through without the horn. With Twi’s training she regains a little bit of control, but like always she’s used to doing most things with her hooves anyway. It does get a lot easier for her tho
They always had this unspoken thing, and things were especially tense when Tempest was living in Twilight’s castle. Temp is way better at hiding her emotions, but Twi really embarrassed herself multiple times trying to impress her. When Tempest moves out, they both feel sort of empty and incomplete, so Tempest bolts back to the castle to confess her love and all that sappy stuff. Tempest is honestly expecting total rejection and literally has a whole breakdown in front of Twilight and her friends but Twilight is like “no no i love you too”
Even though Twilight is much more openly emotional, it’s Tempest who’s deathly afraid of losing her. She’s never really known love, so once she has it, it almost feels too good to be true. She’s super clingy for a while before she realizes she really does have Twilight forever.
This is maybe happening right after Tempest finds out she’s pregnant. They’re both super excited! Tempest takes a long break from her guard duties to make sure the pregnancy runs as smoothly as possible.