To lighten up the mood, imagine Mars and Mable meeting each other. You know the first thing Mable would do us braid the hell out of Mars' majestic mane.
I am a noble knight and he my love, my moon and stars. Though his mount is lovely, sparkling silver it rejects being rode without keys. It loves keys. Sadly, my honey is forgetful so I carry the spare needed to keep his mount noble and steady. I ride to his side often to save him. No matter the distance I will go to him
I like to think that Evenkite's influence on Fordite would quickly disappear as she loses herself in the fusion, but particularily being fused with Mars would do three things to her:
A) The aforementioned losing self in the fusion.
B) Being mixed with Mars, the only gem who has direct memory of their past selves, would awaken bits of Microcline in her.
C) The aforementioned losing self...After the fusion.
After the fusion comes apart, Eve would appear as a blank slate. She would not retain any memory of anything that happened prior unfusing and any semblance of her old personality would be completely gone. Instead, she would behave as Microcline would've, retaining their instincts/ticks and personality, but no memories or awareness that this was another gem. No memories of Microcline or Evenkite or any idea that she's acting differently or that this isn't herself. With time her memories and old self will steadily return and with it will fade any semblance of Microcline that wasn't original there, along with any memories formed during this 'Microcline phase', we'll call it.
Also, funny thing, Bloodstone will probably be the only one to recognize the behavior as Microcline's.
On that note, I'd love to see the Dork Squad's reaction to Eve's sudden change...
@Loonythat is interesting indeed. Maybe it could start with just a semblance of Eve losing herself. The longer the duration of the fusion, and the more often the fusion is, the more she would loose, and the consequences would become more severe.
Also a thought, maybe she her mind would stop recognizing when she was unfused with Mars, and afterwards, would continue to have conversations with herself as if Mars were still there, and would have to be reminded that she was Evenkite again