Help with certain particles and relative coordinates in MCreator

Hello! For my mod currently I am making certain legendary weapons that bestow special abilities upon the user. I have created a function that loads a set of particles that display in the image of a wing, and then I run a code block to run the command in the name of the player using execute. Now this isn't entirely an MCreator issue, but I was wondering if there was someone knowledgeable in the ways of /execute and how minecraft utilizes the relative coordinates.

Onto the real problem, when trying to render the wing it only fits into the correct positions when the entity it is rendering in relative to is facing certain rotations. If someone would be able to help me make a command that can make a particle function lock on the same relative position of an entity, and also face the same way an entity is that would be lovely.