What is happening in the last panel?
Not sure how familiar you are to the source material (The Owl House).
In the series, Grom is an entity that feeds on the fears and insecurities of its victims. One of the biggest ones for Amity (the pink haired gal) was to be rejected by Luz (dark haired on the left), which happens as Grom reaches out to Amity’s pocket and rips her letter (the one shown in the fourth-to-last panel). Luz sees this and reads the letter, but doesn’t know who the letter was meant for, yet.
In the last panel, she finally comes to the realization… A few years and a happy marriage later.
I’ve seen the whole show, but I didn’t remember the note.
Luz realizes who the note was for (herself)
Thank you. I did not understand the call back.
“So desu yo!”