Humans are likely the only race with prevalent influences on all three continents. They are notably more versatile than the other races, driven by ambition and a passion for discovery. They do well in almost any field and are stereotypically considered jacks of all trades. Their culture is heavily diverse thanks to how far they have spread, but overall tend towards valuing ambition and adventurous spirit. They can live alongside any race and have a fair time. See the pages on Adrasteia for the dual empires and their cultures.
Humans are the standard for a medium-sized creature. They sit nicely in between the taller and shorter races, with a height averaging at around five to six feet tall. Their skin color ranges from pale pink (almost white) to dark brown or black. Their eyes and hair tend to have a similar color range.
Compared to other races, humans have very short lifespans. Most of then die just prior to reaching age 100. However, they make up for this by breeding far faster than other races. This is how they've come to be so widespread on Aeonara.
Humans tend toward no particular religion or profession due to how widespread and varied they are.
*Alternatively, you could choose one of the human houses listed in the page on humans on D&D Beyond.