OOOOOOO
Nellcher arrives to the Kalos region one year later after the main events of XY, she landed the barista job one month after settling in thanks to a friend of hers who also happens to work at the café! Her name is Maren :D
Nell keeps working as a barista for a fairly long time and within that term she polished her skills as a baker, which is a hobby for her at said moment. All of her close ones encouraged her to keep baking.
She realizes she enjoys it more than anything else in this world and seeks for workshops around Kalos to learn more, Nellcher can't drop her job so she only studies and practices on weekends.
Once she takes the decision to leave, Gaston offered her to work as the head baker of the café if she ever decided to come back but he also offered her the generous option of using the continuous building as a pastry shop so she would have a space of her own. Gaston wanted both places to be next to each other so he would sell her exclusive desserts and she would offer his coffee. He valued Nellcher and saw great potential in her from the moment she brought her first batches of desserts, Gaston acknowledged her efforts and when his tests were a success, he always praised her for bringing more clients. This was his way to give her thanks for all that she did for the café.

Nellcher did wanted to have a place of her own and Gaston's offer was something that she would only see in her wildest dreams. She loves Flame Body Café but of course, she wanted to go her own way. It was a hard choice for her.

But after having a long conversation with Gaston, there was a deal. She accepted his offer. Nell became the pastry chef of FBC while being able to keep her own shop, it is heavy duty but she got help.

I have to mention that before she travels, Nellcher gets engaged to Sycamore lol They get married after her she comes back from her journey. After their honeymoon, she opens the shop and works on specific days at the café to keep the quality control. Then the rest of the week she stays on her shop baking and decorating~

I KNOW THIS IS TOO MUCH BUT. This could have been longer because the lore is very heavy -sobs-