Passage: Nefertiti (meaning "the beautiful one has come forth") was the 14th-century BC Great Royal Wife (chief consort) of the Egyptian Pharaoh Akhenaten of the Eighteenth dynasty of Egypt. Akhenaten initiated a new monotheistic form of worship called Atenism dedicated to the Sun disc Aten. Little is known about Nefertiti. Theories suggest she could have been an Egyptian royal by birth, a foreign princess or the daughter of a high government official named Ay, who became pharaoh after Tutankhamun. She may have been the co-regent of Egypt with Akhenaten, who ruled from 1352 BC to 1336 BC. Nefertiti bore six daughters to Akhenaten, one of whom, Ankhesenpaaten (renamed Ankhesenamun after the suppression of the Aten cult), married Tutankhamun, Nefertiti's stepson. Nefertiti was thought to have disappeared in the twelfth year of Akhenaten's reign, though whether this is due to her death or because she took a new name is not known. She may also have later become a pharaoh in her own right, ruling alone for a short time after her husband's death. However, it is now known that she was still alive in the sixteenth year of her husband's reign from a limestone quarry inscription found at Dayr Abū Ḥinnis. Dayr Abū Ḥinnis is located "on the eastern side of the Nile, about ten kilometres north of Amarna."The bust of Nefertiti is believed to have been crafted about 1345 BC by the sculptor Thutmose. The bust does not have any inscriptions, but can be certainly identified as Nefertiti by the characteristic crown, which she wears in other surviving (and clearly labelled) depictions, for example the 'house altar'.

Question: What was one possible role of Nefertiti's related to Ahkentaten?
the co-regent of Egypt