Morgiana has red hair and eyes (both pink in the anime), like all of the Fanalis. She wears a short white dress with a rope tied around her waist. She wears her leg chains, which are now a Household Vessel, on her wrists, and a backup vessel, which is a necklace, around her neck. She always goes around barefoot. She has a sturdy yet petite build and is very strong.
During her travel to the Dark Continent, Morgiana started wearing a white sleeveless tunic over her dress, tied with a longer ribbon. Her hair also grew longer, reaching down to her mid-back. She now wears her Household Vessel on her legs.
Morgiana is a quiet girl who rarely talks. She likes strange things, for instance, instead of choosing jewelry for her Household Vessel, she considered two devilish looking manifers (though possibly only because Alibaba recommended them). When mad, she usually puffs up her cheeks or stomps her feet on the ground (which causes it to rupture).
Even though she is physically and emotionally tough, she does have moments when she acts vulnerable, this usually happens when anything regarding Alibaba takes place. It is hinted that she has feelings for him and this is proven when she rejects Hakuryuu's proposal. Eventually, he realizes that she refused to marry him and go to the Kou Empire because she is too attached to Alibaba and very concerned for Aladdin.
She is secretly very insecure because she always deems herself to be useless compared to the others. Her biggest wish is to be useful to Aladdin and Alibaba (probably because she wants to repay their kindness towards her). She is flattered but frightened by Hakuryuu's feelings for her, and she stated that becoming Empress was impossible since she used to be a slave, showing aspects of her inferiority complex.
Most of Morgiana's past is still a mystery, except that she is originally from the Dark Continent. At a young age, Morgiana was taken from her mother and father and was sold at a market as a slave. One of the things that happened to her while she was there was being stripped and shown off naked. During that time, she used to cry out for her mother and father to save her.
At some point, Morgiana was sold to Jamil, who abused her to the point of her being terrified of him, something that still haunts her. Like Aladdin pointed out, Morgiana had invisible chains on her, set by Jamil. She had something similar to Stockholm syndrome, where the captive starts to sympathize with the captor.