• Help, my Guild’s leader has disappeared. How do I keep my guild running?

• Help, I took a break from the game, and now I’m no longer the leader of my guild. What happened?

If you’re wondering about either of the above questions, here is the information you need (source):

To maintain and manage the Guild, a new Guild Leader will be appointed if the Guild Leader goes offline for a long period. When the Guild Leader is offline for more than 30 days, the search for a new Guild Leader will begin. Candidates are members with more than 1000 Cumulative Prestige who were online within 7 days. 

If there is more than 1 person who fits the above criteria, a higher-ranking member or the one with more Cumulative Prestige will be appointed Guild Leader. A mail will be sent to notify you when you are either appointed or relieved from the rank of Guild Leader.

Please note that as this is an intended feature of the game, customer support will not assist with replacing guild leaders on request.