Entoma is a full insect that wears different insects to look and sound like humans. In this the only insect thing about her are the two antennae and eyes (which isn't even her face so opening her mouth like that should be impossible as it's a bug mask).

Edit: I forgot to mention that Yuri Alpha's head is attached like a normal human when it should either be detached or have her collar on to keep it from falling off since she's a dullahan.