I’ve been seeing people make the OR14 => OR15 => OR15A => ORISHA connection and that is correct!
Orisa’s name is more than that. Efi Oladele’s name is Yoruba, so it’s safe to assume that she is also Yoruba.
In Orisa-Ifá, Yoruba religion, Òrìṣa are spirits that act as reflections of Olodumare, a manifestation of the Supreme God. Òrìṣa are in essence a smaller manifestation of that divinity. Some are malicious, some are benign.
In naming her creation Orisa, from an in-universe perspective Efi is literally invoking the divine into something she’s created to protect other people, to act as a force of good.