Character:

Union Academy

Union Headmasters 

Characters of MHA

Characters of RWBY

Characters of DXD 

Roswiesse

Ichika

Houki

Cecilia

Laura (always keep in touch with Jin)

Charolette

Lingying

Tatenashi

Basara and his girlsfriends

and others

Polish Prime Minister From Poland

Lidia Sobieska

(Poland was on the way to Union City, Union Academy for a relationship since after the war) (Even though she learned all the martial arts according to Tekken 8 season 2) 

G-Corporation

Nina William

Remnants of League of Darkness (who finally realigned with G-Corp under the new leader Nina William)

Shie Hassaikai

and

Cinder's Faction

Character challenge

Lidia Sobieska vs Union student (who wants to challenge her despite as Prime Minister and learn for her survival thanks to Martial arts)

Lidia's battle Theme: 

https://youtu.be/2SIPuoDIMzE