I’ve always considered Littlepip to be about 19, like the lone wanderer from fallout 3.
And Velvet Remedy is not 22, which is a mistake I made in my story. I thought she was much younger than Calamity and in her twenties, but apparently it’s mentioned that she’s a decade older than Littlepip, and at one point Calamity makes fun of her age. That would put in her thirties, and suggests Calamity is younger than her.
Homage is also eleven years younger than Velvet, suggesting she’s the same age as Littlepip. (Sure doesn’t show it)
I made Xenith as being in her mid thirties, having Xephyr very young. This was mostly just for shock value in my story, where the seventeen years older, blind, almost crippled and seriously weathered Xenith is revealed to be just fifty three years old (and looks twice the age of the seventy two year old Fluttershy)