Overview
Ib is a 9-year-old girl. She has a cute outward appearance, with long brown hair and red eyes. While her name is pronounced as "Eve", her name is written (and officially romanized) as Ib.
Ib is first seen going to the art museum with her parents for the "Guertena exhibition". After looking at a certain painting, she suddenly entered in an alternate world within the art museum.
The red rose she picked up inside the alternate world symbolizes her life force, and will die if all of the petals have scattered. The rose color is the same red as her clothing and eyes. Her official profile on the game's website describes her as a little rich girl. She begins the game carrying a lace handkerchief, a birthday present from her mother.
Personality
Ib is a silent protagonist. She never speaks a word in-game outside of dialogue choices, but it is also interesting to note that Ib rarely ever shows any expression (although she is not entirely emotionless).
She is described by fans to be a quiet and unusually mature girl. Due to an early scene where her mother first warns her to keep quiet in the museum and then notes that she probably does not have to worry about Ib causing trouble, this may actually be the case. (Of course, this could also indicate that she's just good at doing what she's told.)
Ib also does not outwardly express fear at anything she sees in the museum, and is thought to be strong of heart because of that.
She gets along well with her parents, and loves her mother very much.