Penelope is aloof, goofy and overall an airhead. She doesn't know much about earth nor its people, but has an intense and overzealous curiosity surrounding everything of the like. Despite seeming quite dense and witless, she is relatively clever and intelligent - she only lacks knowledge for the world she's in. She is excitable, and quite energetic, having a demeanor that could be considered intense. Being completely foreign to earth, she doesn't have much of a conception of what's right and wrong, socially acceptable, etc. She often does and takes what she wants without much consideration for the consequences. Despite her somewhat chaotic personality, her intentions are never malicious. When settled and comfortable, a warm, gentle sweetness in her personality is revealed. She stands at a diminutive five feet tall, and has green hair, and green skin which is slightly translucent, and is slightly cold and sticky to the touch. Her skin is slick, but not wet. Being made of a partially gelatinous substance, she happens to be very resiliant and durable, not feeling pain from most physical sources. She only wears an oversized T-Shirt which she scavenged from who knows where. She smells like cucumbers.