Re: Zero kara Hajimeru Isekai Seikatsu - Episode 28 - Echidna Licks Hand

Echidna looks like a pretty girl, but when she licked her hand it was clear she was not normal.

Echidna says she invited Subaru to a Witch's Tea Party. Just don't ask what the tea is made of...

The demihumans of Rosewaal's Sanctuary want out and the only way for that to happen is for Emilia to undergo the Witch's Trial. Subaru became included in the trials for some reason. Obviously it's because he's the main character.