Heru

She's so pretty, its illegal that they ruined her day.

Bonus:

Manager Kim is the Main Character in his titular series and a minor characters in the main series Lookism.

He's a member of White Tiger Job Center, a minor antagonistic group, and fought against the main character, Daniel Park (Park Hyunseok).

He will be the teacher of the minor supporting character, Warren Chae (Wonseok Chae).

Please note that although it shares the same universe as Lookism it actually happened a few years before the start of Lookism.

MAJOR SUPPORTING CHARACTERS THAT APPEARED OR WAS REFERENCED IN OTHER SERIES:

Seong Hansu is the father of Seong Teahoon, a main supporting character in Viral Hit. He also made appearances in Viral Hit several times.

Jincheol Park is the father of Dabin Park, one of the main love interest in My Life as a Loser. He also made appearances in the series.

Tom Lee (Dogyu Lee) minor supporting character in Lookism. He is the teacher of the major supporting character Eli Jang (Hyun Jang), had relationship with several characters (including the main character and several antagonists) and played minor to significant roles in various arcs of Lookism.

White Tiger Forces is Lee Dogyu's self-made organization. The major supporting character Johan Seong (Yohan Seong) will join this center for a time and ot will be contracted by a major antagonist of Lookism, Eugene (Yoojin) of Workers.

MINOR CHARACTERS THAT APPEARED OR WAS REFERENCED IN OTHER SERIES:

Samdak a minor supporting character in Viral Hit. He is the father of the supporting character, Ga-Eul and the teacher of the main character, Hobin.

EXTRA CHARACTERS THAT APPEARED OR WAS REFERENCED IN OTHER SERIES:

Seong Taehoon, a main supporting character in Viral Hit and the son of Seong Hansu.

Lee Manseop, a North Korean member of Security Team who fought the young Seong Hansu during the "First Assassination Attempts" is the father of an extra antagonist character in Viral Hit. He was mentioned by his son during his fight with Seong Teahun.

Park Dabin from My Life as a Loser (Chapter 89).

Goo Kim (Kim Jung Goo) is a minor antagonist character in Lookism.

Sofia Alexander, a minor character in Lookism is the sister of Alexander Alyssa and the cousin of Alexander Valentina. She also made a cameo and is assumed to be the "Sofia" that the Russian Killer, Broflovski is speaking with on the phone call.

Samuel Seo (Seong-Un Seo), a supporting character in Lookism (Chapter 188)

Alexander Hwang, a minor character in Lookism (Chapter 190)

Yohan Seong (Johan Seong), a supporting character of Lookism (Chapter 193)

CHARACTER FROM OTHER SERIES THAT MADE CAMEOS:

Ga-Eul from Viral Hit (Chapter 77)

Xiaolong, a minor antagonist from Lookism (Chapter 108)

Warren Chae (Wonseok Chae) and Sally Park (Serim Park) from Lookism (Chapter 188).

Daniel Park (Hyung-Seok Park), the protagonist of Lookism. Along with Doo Lee and Warren Chae (Wonseok Chae) (Chapter 191)

Charles Choi and Gun Park (Jong-Geon Park) (Chapter 191)

OTHERS:

The Sacred Celebration Assembly, a human trafficking Yakuza (Chapter 57) mentioned that they had previous dealings with Warai Oni, the main antagonist on the first part of Viral Hit.

The minor antagonist, Vivi's father is the chairman of T Group that appeared during the successor arc. He also made a cameo along with Xiaolong.

Brebdak, the mentor of Vasco (Eun-Tae Lee) the major supporting character in Lookism (Chapter 180)

An-Cheol Jang, the protagonist of My Life as a Loser (Chapter 182)