Same logic as Delta but reverse. Ero is actually a boys name. (Though, it should really be Eero since that's the traditional spelling.) Same goes with her full name "Ervayo", it's a varient of Arvayo and that too is also a males name. Though then again, it is a trend that male names transiton to female names so who cares (such as Alison, Whitney or Madison (which btw, is why she is canoncially MTF)). Winter is the only other that I'm aware has "traditionally female" name, but I already made a female Winter. in the past Press space to see the artwork without dialogue
Reaslticlaly, Ero would've been wearing the same clothes. But the real reason why she has diffrent clothes is becuase I don't want to simply remove her eyelashes and call it a "male design", so I decided to give her a new outfit in this prokect. I can immagine Ero being into Tomboy or Andronystic clothing and yes, Ero can see fine without her glasses, even though she has myopia (nearsightedness), Professor hogs hasn't learn his lesson yet... even after seven years have past