Ahahah oh no I'm so sorry Ecks but Elphaba probably hates you a little bit at least at first. Then again she has a storied history of swinging around to being friends with people she initially loathes, so depending on how long they've been around and how willing Ecks is to agree to disagree about the nature of the Reflection they might eventually get along. It'd definitely be a rocky start, but Elphaba's naturally very curious too and the temptation to learn more about this world where there are other people who are green like her would eventually get to be too much for her to just avoid Ecks entirely, no matter how badly their first interaction goes.