no, no, no...it's like this:
The Orochi was an eight-headed serpent, right? Well, there are Eight members of the Orochi family for each head, and they have evil powers in their blood. They are:
*Chris- Fire
*Yashiro- Earth
*Shermie- Lightning
*Vice- Electricity, for some reason...I think she's darkness, really
*Mature- Light, even though she's evil
*Yamazaki- The mountains
*Gaidel, Leona's father- Water
*Goenitz- Wind
Iori and Kyo's ancestors both vanquished the Orochi Clan 1800 years earlier, but 660 years afterwards, Iori's family, wanting power, struck a pact with the Orochi in which they gain dark powers, but shorter life spans. That is why Iori has Orochi Blood, and that is why he and Kyo have such a rivalry.
Goenitz, in the 80's, wanted to re-awaken Orochi, and riled up the descendants of the Orochi clan, except Gaidel.
Gaidel was against Orochi because he found so much in the Human world, even marrying a human woman, and having a daughter, Leona. Leona was half-human, half-Orochi, so her blood is not fully Orochi, making her prone to Blood Rages, which her body cannot handle. Goenitz knew this, so to get back at Gaidel for refusing to help him, he made Leona's Orochi blood go berserk, and she killed her father and the rest of her family.
Goenitz succeeded in summoning Orochi, and Orochi needed a body to host in order to take a form. He chose Chris, who was one of the Orochi family. That's why Chris turns into Orochi.
Understand?