At the beginning when the karma trailer came out, I thought that the one who saw Jinwo in the karma trailer was one of the itarim race. it turns out not, he is the first Baran successor mryo.
my theory. Before Myroa died, she gave the remaining power of Baran to Jinwoo, so that Jinwoo could find and give it to the next successor of the White Flame. Jinwoo searched after the Monarch War and the thought that crossed Jinwoo's mind was Esil. Jinwo created a system for Baran's power and gave it to Esil without Esil realizing it. In chapter 48 of solo leveling, Suho said to Arsha, "Was my father the one who gave the system to the three of you?". "No, our system is better than yours". Here I thought maybe this Esil system, Jinwoo was the one who gave it. With the condition that when Suho awakens his system and meets Esil, then Esil's system will awaken. Gray was given the system directly by the Beast Monarch. Ammut was given the system directly by Tarnak and Kandiaru (reserve successors to the Monarch). Other successors get it from their monarchs. Why is the system on Suho's side harmless while Arsha's is dangerous?.
Because Suho and Asli are modified systems. Gray must be the successor, but his blood and power are taken over and over again. made the system error and survived after being with Suho. The ammut system is the same. he was created (backup) and trapped for a long time in the pyramid causing the system to error, the system survived after meeting Suho. Arsha, Pia and Granga are the original systems. the original system inherited directly by their monarch along with their monarch's power. After the first successor of the monarch betrayed their monarch and was replaced by the second successor of the monarch. In chapter 48 Arsha said, "my system doesn't tell you to be my friend, it means you are an enemy." Here I think, the Arhsa, Pia and Granga systems are monarch path systems. while Suho's system and others are legacy systems on the safe road. Suho's system gives additional skills, namely bonb skills, to the monarch's successors except for Suho, whose bonb skills are still a mystery. on Arsha side most likely there isn't any. in chapter 48, "so this is the advantage of their system", as if Arsha's system doesn't have that. maybe there is but with other things.
Arsha's party system is guarded by one person. most likely one of the itarim. Why don't I enter Kandiaru? because Kandiaru is completely dead. When the Cup of Reckoning is active, it only applies to the earth. People who die inside the gate are invalid. Maybe he appeared and became an enemy of Suho, Jinwo, other rulers and monarchs. his appearance is 50/50. 50 may be completely dead and will never appear again. 50 more will appear as enemies.