https://youtu.be/bQpq9IBFCao

Tekken Monks: 

Heihachi Mishima

Tekken Monks group

Tekken High Preist Seriyu 

(The defenders of Tekken Monks and their master high Preist Seiryu)

Raiden Shogun

Zhongli

Chonygue

Dusk

Ling 

Nian

The Hasira: Giyu Tomioka, Matsuri Kanroji, Obanai Iguro, Sanemi, Shinazugawa, Gyomei Himejima, Muchiro Tokito, Shinobu Kocho, Kyojuro Rengoku and Tengen Uzui

(Flashback back to Tekken 7: Heihachi somehow survived from fall of Lava, when High Preist Seriyu, Raiden Shogun and Zhongil rescue Heihachi Mishima after his defeated by Kazuya Mishima and following AFO, Salem and Belphegor defeat and death)

Poland and Mishima Zaibastsu (remaining remnants group):

Lidia Sobieska

Yoshimitsu

Jeanne

Location:  Genmaji Temple

Battle theme:

https://youtu.be/dqCZ4iiux0I

Heihachi Mishima vs Tekken High Priest Seriyu

Next switch to another opponents (Still theme battle is still the same)

Heihachi Mishima vs Hashiras (as survival of fist against swords)

Next another (Still theme battle is still the same)

Hehachi Mishima vs Raiden Shogun and Zhongi (survival battle against their powers)

As for Sieg, and Astolfo talking to Tomioka about the history of fighting demons and the Mishima Clan, as Tomioka explained about the Mishima Clan family before Mishima Zaibatsu, before powers, and before as Union Academy, hearing about Mishima Blood and Mishima Curse of Mishima families against each other in hatred and about Hachijo Clan, Tomioka never heard about Hachijo clan. Sieg explained that Hachijo Clan were the carrier of the Devils bloodline and now passes to Mishima Bloodline (Kazuya and Jin were the only devil's bloodline)

Meanwhile in Union Academy aligned Yggdrasil

Irina and Xenovia after hearing their master Claudo sacrifice, Irina and Xenovia study the clue about the Mishima's family moves and fighting style, the two duo examined their fighting style, the Mishimas enhance their fighting style with chi in form of electricity perform of Wind God Disr. Electric attacks are every unique and distinguishable colours of electric ability: First Heihachi Mishima (yellow/light blue/orange-red), Jinpachi Mishima (black/purple), Kazuya Mishima (Blue/indigo), Lars Alexandersson (purple/blue), Jin Kazama (red, originally blue), Reina (yellow/purple) and Kazumi Mishima Hachjio (yellow/red)

Then Rias, and Issei came to see Irina and Xenovia but he brought Basara, Mio Jin (Basara's father) seeing about history of Mishima's, but little to know about Mishima Style karate an ancient art, design to exterminate demons but unknown for many, many centuries. They heard rumors about so called 'Ultimate technique known as Star Crusher was lost for no reason. Rias could tell, she remember father about the story in the Great War as one person wield the ancient martial art "Ultimate Technique" Star Crusher exterminate entire devils and demons as many fear about the Ancient martial art was belongs to the Mishima Clan. Akeno could tell that The ultimate technique was forbidden used long time ago.

location: Genmaji Temple