Ini Miney had a sister, Mimi Miney, who was involved in a malpractice incident at the Grey Surgical Clinic that took place on May 2, 2016. On the 24th of the same month, Mimi crashed her car into a road barrier with Ini in the front passenger's seat. Ini died and Mimi's face was burned beyond recognition. Mimi decided to claim to be Ini so that her face would be reconstructed as such and she would be able to restart her life in the guise of her sister.
Thus, the Ini Miney who appeared as a witness in Maya Fey's second murder trial was really Mimi Miney. This means that nothing is known about the real Ini other than her appearance, although Mimi's mannerisms may be based on her deceased sister since Mimi's real personality was revealed when confronted.
All that is known about Ini's personality comes from her sister's impersonation of her. Since Mimi would wanted to have aped Ini as closely as possible, it can be reasoned that the impersonation was not far from the real thing. Therefore, according to Mimi's impersonation, Ini was something of an airhead, having very poor short-term memory and little to no understanding of what was going on around her. Her speech was punctuated by an overuse of the words "like" and "totally", and she would occasionally stop in the middle of a sentence, having forgotten what she was talking about. She was a devout fan of the occult and apparently studied "parapsychology" at college before her death. This tended to irritate Mimi, who was both skeptical and had a strong dislike of the occult.