Deadeye theory

we all know Sona cant talk, so this new Deadeye champion, or Jihn may be a villian, because he may have been involved in the incident that caused Vi to quit the gang that she jinx ekko, and who knows who else were in and in taking sona's voice, have no clue about Zed or Garen though, maybe it was what caused Zed to kill his master (read in lore), this is one thats more crazy about Garen, but maybe this is why he wasn't able to kill or beat Katerina . Just a theory.

Also looked it up, maybe irrelevant but looked it up what the name means, and it means "You should understand that these weaknesses are caused by fear and self-regret". Heres the link to the name page http://www.names.org/n/jihn/about