honestly the way stella gets her charmix is some of the most vulnerable and raw writing i've ever seen in the show. many of us know stella has a hard time talking about her parents while layla struggles with issues stemming from her feelings of not belonging in season two. and so when layla innocuously brings up stella's parents, she feels guilty and out of place for not immediately recognizing the sensitivity, which awakens long-unhealed wounds in both of them - namely around loneliness and isolation. it's crucial here that stella initiates the conversation with layla, as she can empathize with her in this moment, and in doing so they grow closer and more understanding of each other. the fact that stella gets a mirror-shaped pendant shortly after is just a cherry on top because stella and layla are mirror images of their past selves and traumas in this scene regardless of how or why they have felt alone or isolated.