Here I will post the images of all the important/relevant characters, OC characters mostly, and some original characters. I kinda suck at character description so I decided to create this. I don't have the pictures for all the characters at the moment, but they will come in the future.
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The images don't belong to me, they belong to their creators, I just use them to help imagine how characters look.
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[Dugu Xin]
[Dugu Bo]
[Yu Tianxiang (OC)]
[Zi Ji]
[Ma Jun (OC)]
[Yao Chen (OC)]
[Meng Shu]
[Chao Tianxiang]
[Li Jingying (OC)]
[Luo Tian (OC)]
[Yao Jie - Lightning Lord Douluo (OC)]: 50 years old
[Gu Mo - Spirit Bone Douluo (OC)]: Looks 20 due to a spirit herb he ate. He is actually 45 years old.