A while back iirc, it was more subtle especially when compared to Tooru’s feeling for Kobayashi, but I think there was a flash back chapter with her and Tooru that made it more obvious.
It was obvious from that flashback chapter was it? Can't remember but it was tohru and elma talking about their past. Still, I did hope she has a thing for kobayashi instead.
Elma has nothing to be sorry for with her being best girl and all. Love how she goes from silly to serious all while eating more than most entire pro sports teams.