Willow Glenne is a not-so-well-defined character whose current most important thing is that he is Heather's boyfriend. (Note Heather is a SFW character. Neither of them are sexually active. Willow is a horse and a sub though so his balls are fair game.)
Being gentle, soft-spoken, and a good bit effeminate, Willow is likely to be teased by macho boys who would feel very inadequate if they knew of certain proportions of his person.
Willow is likely to be a mage-type character with a talent for lightning or other "nature" magic.