The larvae are attracted to you by magic. When you enter ritual space and perform magic it sends out a kind of light or beam that makes you visible to these things. Your magic circle and consecrated space are what protect you from these things getting in. The more you do magic or enter into the astral (in-between realm) the more visible you become to these things. They are not products of trauma or attracted to trauma, trauma causes disruptions in your light body that makes you susceptible to possession by spirits. The larvae in general are just trying to bring you into their influence so they can feed off you, there is a clear difference between what the larvae want (which is you to exist in an emotional cycle) and what the trauma does to your light body (creates a gash that allows more powerful entities to get in you).
So lets say you have generational trauma, or just regular complex trauma, you may have maladaptive emotional reactions or behavioral cycles as a result of this. Lets say a current boyfriend says something that reminds you of your father and you become triggered and have a violent emotional outburst of anger. The larvae feed off that and will try to keep you trapped in that. The larvae are there for the anger and will try to keep you in that state. Now that unreasonable reaction may be caused by past trauma but it is not the product of the larvae's influence or what they are feeding on.
Larvae are rather low-level entities, really beneath any person or entity and are incredibly easy to cast out, it can be as simple as imagining a light explosion from your body or vocalizing a banishing, but they are like a zombie hoard in that they will keep coming and coming. As we grow in magic and become more visible to them it becomes essential that we adopt some type of alchemical or initiatory practice that helps us transmute our shortcomings or negative emotions into virtues as this is really the only way to keep them from effecting or influencing us.
So if we have generational trauma and this effects our emotional reactivity or tendency to dwell in negative behavioral cycles what we can do is cast out the larvae when we notice our irrational cycle and work on developing healthy coping mechanisms with our trauma through mundane therapy.
Someone with trauma that has done the mental health work will not be as susceptible to the influence of the larvae as they have overcome their irrational coping mechanisms and cycles. They will however still have a "gap" or "hole" in their subtle body that needs to be addressed through occult methods. Some things, if they are bad enough, can take lifetimes. But for those gaps/holes trauma has caused that are on the surface of the light body and are ultimately allowing negative spirits access to our body those can be addressed through initiatory techniques.
One of the ways I personally help people address those issues is by diagnosing what the trauma is rooted in using hypnosis, then planting it into a planetary sphere. Once the sphere of the trauma is identified the client then begins an initiation into that sphere to heal the gap/hole. For example if your trauma is a mother-wound that effects your relationships an initiation into the sphere of Venus or her associated godforms would help the person spiritually/karmically heal the wound. This process should only be engaged in after the mundane therapeutic/psychological work has been done as you should already have developed healthy emotional coping mechanisms to help you in your wordly life. Initiation to relieve the karmic and spiritual issues of your trauma may cause emotional reactions that will then make you highly susceptible to spirit possession and being leeched off of if you do not have control of the emotional reactivity tied to unhealed trauma.
