In chapter 42 [Nightmare], it was hinted that Marcille's father died before her because of age, that she outlived her father, so yeah, she may be a half elf.
Cheezus, so it just dawned on Marcille that her best friend only has just over a 10th of her lifespan... If Farlynn's in her early twenties, it would be like us hearing that someone we knew would die in in about four years.