In Dungeons and Dragons elves reach puberty at 25 and adulthood at like 110/125 and they are famously long lived (700 years or so, depending on the game version). It's up to the GM if the elf's age is okay, this is their universe after all. Also, I do believe all of the available shift character slots are taken. And what affiliation is your character? Flare isn't an option.