Romero is an optional boss in Soul Hackers.
Romero is an intelligent monkey created by Dr. Thrill. He is found at the end of the Primate Intelligence Labs and instead of fighting him like a normal boss, he instead gives the protagonist four riddles to "defeat" him. Getting a question wrong results in getting sent back to the beginning of the floor. After getting his four questions right, he is surprised someone could solve his riddles; the protagonist is then given a choice to either finish him off or help him. Choosing to spare him results in Romero summoning five Rolwoys and attacking, while immediately attacking only results in three Rolwoys.