From OP’s linked article:

[The same people use] a second AI persona, a young purple-haired woman called Amelia, who appears in various Danny Bones videos and standalone clips. The character was originally created by the political and media literacy organisation Shout Out UK for a Home Office-funded video game designed to steer teenagers away from extremism – but was then co-opted by the online far right and became a viral sensation.

So yes, I guess “she” is. (Assuming Amelia and Emilia are the same persona; I didn’t check).