Do I trust Ekko? That's an interesting question. I think Ekko started this game as town, he made two posts hinting at his role last phase which I'm sure you noticed. I feel like I know what role he was hinting at but I could be wrong, how do you interpret his hint posts from last phase?
Also I've never seen what a day 1 scum Ekko looks like before, but I have a hard time thinking a scum would act the way he did last phase. Does he act like this in past games on day 1 when he rolls scum? So ya, at the moment I'd say I'm like 60% sure Ekko started off this game as town.
As for Ekko thinking that you're scum, well I disagree with him. I don't think you've done anything scummy this game. Your questions to Melkor were normal, your red dragon trick was fine. But most important, you saved my life. There would be no reason for a scum Light to save me, you would just sit back and let me die lmao. I'd say I'm 95% sure you started this game as town, I'll be very surprised to find out you started this game as scum because your actions would make zero sense.
However the key words are "started as town", I do think you would be an excellent cult target. If I was cult, I would either try killing you or culting you on Night 1 to either get you out of my way or on my side. So the longer you're still alive in this game, the more my distrust of you will increase. Sorry but that's just that nature of cult games unfortunately.