My partner has DID and we have a polyamory relationship. My partner (let's call E) has a male body and the main as presenting male. Recently he has been letting one of his feminine personalities (let's call L) be in control almost 50/50. The other personalities usually don't date other than E, but L wants too as well and is dating this person (let's call T). Now T already has a partner and is trying polyamory out. T has feelings for me and E made T admit them to me. Now E thinks that T and I should date (I like T as well), but L is an extremely jealous person and thinks that T just wants to date me because I have a female body. E straight up told me that L wants to sabotage any chances I have with T and E is rooting for T and I to be together. I honestly don't think L would want polyamory to begin with and just going along with it because T already has a partner (the already established partner for T is a cis woman so the aggression towards me for my body makes me feel like I'm an easy target for their insecurities because I am not dating T to begin with and is just a crush thing). E and I are very polyamorous and have been dating as polyamory for awhile and L is showing red flags that they may not be cut out for polyamory. Right now L's aggression is scaring me and making me scared to even date E, because I'm afraid things might turn violent with L. I don't even know how to talk about it with E.