For starters I haven't posted any descriptions about Kei's personality, History, likes, dislikes, dueling career, favorite Cards, or her relationships with others
-Met Seto and Mokuba at a party(where she also meets Zigfried Von Schroeder) The first thing she did was gifting them a "Meeting" Present/Gift, which is a tradition from every Aozora Generation.
-Became a duelist at 12, and won her first duel between an experienced duelist, Yamato Ryusuke(YGO OC/ May Mention).
-Likes a lot of sour sweet candies, Art, Fashion, Reading, Comics, Collecting.
-Her deck has a mixture of Zombie and Spell caster Cards due to her still collecting, also enjoys dragon cards from Seto's influence on her because he and her like Dragons.
-Very Self-Taught, Avoidant, Introverted in some Cases, lack of social communication, trust issues(Reason:The divorce of her parents because of in laws judging her parents relationship and the parents of her father wanted grandsons not granddaughters because having sons would bring honor to the family, and she thought that her mother would visit, but never was seen again.)
-Her Favorite Cards are, her Crimson Magician(Made Up Card) The Toon cards, Marshmallon, Kuriboh, Any Spell Caster Cards, Dragon Cards, and a Holo Red-Eyes Black Dragon Card.
-Her love interest is Seto because she knew him for so long and she brought joy to him, and I think that he might enjoy her presence.(P.S she was the one that influenced his outfits, because she used to wear a lot of coats, and did a lot of dress up as a kid, so she knows what looks good. It also influenced her too)
-She was the modern-day reincarnation of Khepri, and obtained the care of the Millennium Pendant. But to her surprise, she learned that Khepri was also a Queen and married Priest Seto, who was an ancient version of Seto she knows, back in Ancient Egypt, and there was an ancient version of Mokuba, who was Khepri and Seto's daughter, Saira, who was the queen after the passing of Khepri.
-Her dream is to give opportunities to orphans for education and to be adopted into families, since she already knew that Seto and Mokuba were adopted, she wanted to give opportunities to kids in need.
-She has a partnership with KaibaCorp and Industrial Illusions, and distributed cards.
-Kei would eventually make a school for duelists just like Seto did in GX, But this school would also be a creativity like environment, for students to explore their hobbies in such. It will be open for all, no funds are needed because Kei would be in control of AozoraCorp and funding the school.
-She would eventually get married, but it would be private for safety reasons, and hidden by the public, until she finally shares the news to the world.
-She would later have 2 daughters(Names not included yet..), Possibly 1 son.
That's all about her and some spoilers for her future.