So here's the idea; a Dragon Ball Z and a Sword Art Online, with a little Naruto in it including an oc.
Now this is about Goku's daughter who is 7 years older then Gohan in the start of Dragon Ball Z (which makes her twelve) she trains for a year has full control over her giant ape side and made Gohan treat her like she was the alpha when he was in giant ape mode (she keeps her tail). She also has had the all the tailed beasts and a black phoenix demon, knows how to control them all and knows all their names but still has insomnia from Shukaku ( unless she has a mate), and has a personal joke with the four tails about its name (which is Son Goku the name of her dad) has all the beasts jinchuriki traits but was always hidden in a genjutsu by the tailed beasts. They were put into her by Kami, when she was in Chi-Chi's womb, because they escaped the moon prison and were sealing themselves inside random people (adults, elderly, babies, teens, etc) who would die, because they weren't strong enough, in a maximum of three months if they were lucky five years before she was conceived. She had achieved super saiyan at age 6 (thanks to the tailed beasts) but never told anyone because she didn't know what it was, she also never told anyone about the tailed beasts so only Kami and Mr. Popo knew of them and they didn't say anything either. She has all kekkai genkai because of all the mixing of clans through the generations, has a heart on her forehead for the strength of a hundred seal. She helped beat the shit out of Frieza and left with her father to Yadrat and finishes her training in half the time he did and just instant transported back to earth and made a genjutsu about her crash landing in a space pod. She went home and started studying to get to collage level. She is a technology expert. She meets Asuna in school and becomes great friends with her. She then got a package in for the sword art online beta and started playing and got to level 16 in two months. She then feels Frieza's power level and goes off to fight him. When future Trunks pulls Goku over to the side he pulls her as well, she could feel something off about Trunks but said nothing, (optional she can have the same heart virus as Goku or not). When she gets back home it's time for the full version of SAO and she starts playing it (username is ShinaTina) with a male avatar (she doesn't like skirts, she's a total tomboy but with long spiky hair), she helps Asuna like Kirito helps Klein. When the Beater thing happens she says she's one of them and leaves but waits for Asuna and they start traveling when the knights of the blood oath ask them to join and they both said yes but when it came to a skirt she said no but the uniform wasn't her style at all and even Heathcliff said she looked awful wearing it. So she asked for some time to go and get different armor and they accepted. She then comes across a secret location that had giant apes/monkeys called, you guessed it, saiyans, and one of them was her (she knew because Kurama's seal was on the stomach, she couldn't hide it in giant ape form), she got pissed off and started yelling curses at Kayaba while kicking ass. When she was done she got her regular training outfit (dark red sweater with lighter red tanktop underneath, black leggings, ninja sandals, and black leather fingerless gloves with blood red hearts on them). She then went back to the guild and became second in command with Asuna being third. Her nicknames within the game are 'the midnight angel', 'the princess of death', and 'the midnight angel of massacre'. When Kirito comes and doesn't like the NPC slaughter plan she agrees with him. Then the Griselda's ghost thing starts she knew ghosts exist but knows it wasn't a ghost that did it, when they see Griselda's ghost she just smiles. Now she takes Asuna's place but with a few sarcastic comments here and there. When the ghost girl in the forest story came up she really wasn't scared as she dealt with worse, the plot goes on from that episode. But that night when Yui was gone she decided to tell Kirito all about herself and so she did (but after warning him that she's never told anyone some of this) from her being a half saiyan (her tail came into SAO with her) to the tailed beasts, she told him everything, she could also still turn her eyes different colors and trap only one person at a time in her mangekyo (no NPC'S or bosses can be caught) and pulled him into her head where she introduced the tailed beasts and Phoenix demon where they growled and nodded to her saying nonverbally that he was her mate, exited her head, and said to him (because the tailed beasts showed her how their other hosts were treated) "I understand if you don't like me anymore because of this." while looking down about to cry when he lifted up her chin and looked her in the eyes and said "like I said before with when we were talking about Grimlock and marriage, ' if you marry someone that means you love every side of them you already know. So if you find a new side after to love, it means you'll love them even more' just like this, just like I love you, I will always love you and everything new I find out about you," she looked at his soft smiling face and kissed him. After that the plot returns to normal with more sarcastic comments and things. When the ALO arch starts Sugou want her to be his mistress after he marries Asuna so he locks ShinaTina up, same thing happens in that arch except for a lot more escape attempts, sarcasm, and malice. After that is over it will be the day the attack, Kazuto gave her a sensu bean and she was in perfect health and started to go towards the battle and helped. When Cell came he went after Kazuto, Asuna, their families (Kazuto gave Asuna an extra sensu bean on her request) she came and held up Cell with some of her sand, gave some sand in the form of bracelets to all of them and swords to Asuna, Kazuto, and Suguha and told them to run as fast as they could and she'd take them some where safer when she could. Two hours later she instant transported to them and took them all up to the look out(via instant transport). DBZ Plot keeps happening but she would train Trunks since she figured out that he had the tailed beasts inside him since her future counter part gave them to him when he was a baby right before she died. She trained Trunks because he had no control over them at all. After that Vegeta went in by himself and after that she went in there with Kazuto on his request. Six months in the time chamber go by she'd been very distant from Kazuto so she doesn't hurt him, because she's be loosing control of her instincts and wants to mate him. Shit happens and they're mated and she trains him some more (with chakra and Ki) till they can come out. When they come out Kazuto has a more muscular but still lean form and is now even more of a badass. They both survive the Cell Games and don't need to be revied by the Shenron. The GGO saga happens but she's there for it and then everything else happens because I can't think of anymore details at the moment.
OC's personality: kind, sweet, a lot like her father, not as dense as her father, very smart (because of her mother), sarcastic, can be fierce like her mother,
Likes: training (in secret when she was younger, her mom didn't want her to train), meditation (since she can't sleep), fighting (she IS half saiyan after all), her demons, her family and friends, animals, Kazuto, Yui, reading.
Dislikes: bad guys, Suguo, jerks, perverts, skirts, dresses, school sometimes.
Message me if you want to use these ideas, I will not take copywrite without permission. I will also help and become co-author if needed.
The tailed beasts in order of their number of tails and black phoenix:
1 Shukaku
2 Matatabi
3 Isobu
4 Son Gokū
5 Kokuō
6 Saiken
7 Chōmei
8 Gyūki
9 Kurama
Black Phoenix demon; Rea ko (pronounced: ray-ah-ko)