The verb to fancy is a transitive verb whose primary meaning is like, love, feel attracted, have a taste for, etc. In the specific usage of "I fancy you" it means "I love you." As told in British Language.
So, I see a lot of pictures and doujin for Little Witch Academia, but I thought it wasn't really all that yuri-ish? Is it worth watching or...?
Well, it is enjoyable to watch. They have an interesting relationship, but no, it's not yuri. Second season has some subtext, I suppose, and Akko's seiyu ships them, somehow, along with some of the crew members, but the director literally forbid the writers to pair the main character with anyone at all.
I see. I'll check it out sometimes then if there's a small bit of subtext. Thanks for the response!