Appearance and Abilities
Humans look like humans, simply, they have the same diversity in appearance that you would expect from humans outside the Talse Uzer Story. Some humans may have different characteristics from ordinary humans, but this may be because they are a hybrid or have gained a power that alters their appearance.
Humans do not inherently possess any abilities that are out of the ordinary, but there are families that through different means have gained unusual powers. On a base level, they are weaker compared to other naturally strong races, with cross-species hybrids being noted as usually possessing more power than humans. 
There are several different kinds of cross-species hybrid in the Tower and it can be difficult to ascertain whether someone is a "pure" human or a hybrid. E.g. Androssi Zahard has a horn on the right side of her forehead, which may indicate that she is a hybrid or she may have gotten that horn through some other means.
Notes and Trivia