Human
Humans are medium-sized, featherless bipeds and seemingly the embodiment of the golden mean amongst the class of life referred to as humanoids. They are also the namesake for said class on basis of being simply the most populous, most diverse, and least distinctive. Their general alignment in systems which use one is Neutral Evil, but their general adaptability, variety, and fear of commitment to anything even beliefs means that they are more functionally True Neutral and they are fiercely battled over by forces of good and evil both from within and from without. They are far and away the most populous and inclusive species and will generally accept anything and anyone as long as it requires minimal effort or benefits them personally. This is a double-edged sword as it means they can be some of the most welcoming friends or the cruelest of oppressors. They are also the fifth most alcoholic sapient species in Bomsil after goblins,dwarves, Sygoly, and dragons.
Biology
They also have a terrifying ability to breed with and assimilate other species, rivaling dragonkin in this regard.