Like a matron from a psych ward?I’ve had that impression based on the attention to detail in how the bodies were staged and how Honey suffered an injury to her face. Honey seemed to be treated with less respect compared to Barry during and after the crime. It seems like something a spiteful female would do to another female, imo.
I think a male was present as well. Like you said it took strength to do what they did, and it was brutal. I think the female tried to reframe the crime scene into something more gentle than it actually was, but she purposely left Honey with less care.
Just my opinion, and impression. And I’m not sure if it’s a female or an effeminate male.