As the wealthiest man in New Orleans, Big Daddy is also the most powerful man in the city. He appears to be a single parent, as Charlotte's mother is neither seen nor mentioned throughout the film. He is also something of a father figure to Tiana, having been good friends with her mother, Eudora, for many years—in no small part due to Eudora running an esteemed seamstress business, which is responsible for supplying Charlotte with many fairytale-inspired ball gowns. Despite his position of power, Eli is shown to be loving, jovial, and friendly. His eagerness to fund smaller businesses such as Eudora's and the local newspaper shows that he is incredibly generous with his wealth. Because of his friendly nature, however, he can also be a pushover—specifically with his daughter, Charlotte, who constantly exploits her father's fortune for her own obsessions, such as lavish dresses and gowns. Even so, Charlotte takes after her father in that she is warm-hearted and generous, despite her privileged lifestyle.

Here is a link to a reference video of his voice that includes the audition lines (though I am open to other interpretations of his voice!): https://drive.google.com/file/d/1r-AJpypUjAkSUjzLu_jIwImxEdcdVXx4/view?usp=sharing