
Yes, agreed! I do not understand how they are still unable to recognize the characters at this point of the story. The author has her/his own particular style but she/he made sure to add different color hair/eye, tattoos, makeup, mannerism, height, etc. Here some pics with their respective names. I hope it helps for those that are still confused.
Yama/King of the Underworld = http://www.mangago.zone/read-manga/fate_makes_no_mistakes/nto/to_chapter-20/7/
Eunjae/MC/human = http://www.mangago.zone/read-manga/fate_makes_no_mistakes/nto/to_chapter-20/14/
San/Goblin = http://www.mangago.zone/read-manga/fate_makes_no_mistakes/nto/to_chapter-19/11/
Geumsun/Goblin = http://www.mangago.zone/read-manga/fate_makes_no_mistakes/nto/to_chapter-13/17/
704/Reaper = http://www.mangago.zone/read-manga/fate_makes_no_mistakes/nto/to_chapter-3/18/
Hwan/? = http://www.mangago.zone/read-manga/fate_makes_no_mistakes/nto/to_chapter-19/18/
Tae heon/human/Eunjae's co-worker = http://www.mangago.zone/read-manga/fate_makes_no_mistakes/nto/to_chapter-14/2/
Yama + 704 = http://www.mangago.zone/read-manga/fate_makes_no_mistakes/nto/to_chapter-12/2/
Geumsun + 704 = http://www.mangago.zone/read-manga/fate_makes_no_mistakes/nto/to_chapter-12/14/
San + Geumsun = http://www.mangago.zone/read-manga/fate_makes_no_mistakes/nto/to_chapter-14/9/
Eunjae + San = http://www.mangago.zone/read-manga/fate_makes_no_mistakes/nto/to_chapter-14/11/
Eunjae + Tae heon = http://www.mangago.zone/read-manga/fate_makes_no_mistakes/nto/to_chapter-15/15/
Eunjae + 704 = http://www.mangago.zone/read-manga/fate_makes_no_mistakes/nto/to_chapter-18/21/
Yama + Geumsun = http://www.mangago.zone/read-manga/fate_makes_no_mistakes/nto/to_chapter-20/5/
pretty sure the only reason that people confuse the characters is because they dont care about the plot and quickly skim just to see the yaoi parts but lol...