This name comes to us through legends and myths whose full stories are now forgotten. So much so that we do not know whether Tsui is an ancient name for one of the gods or the name of a great hero. We can be almost sure that the name dates from pre-splitting culture because mystical weapons ascribed to Tsui are spoken of across Titan. Some say that these weapons have even been found.

There are certain scholars who believe that Tsui is an ancient name for Sukh, others for Hydana. There have even been suggestions that Tsui is a powerful god no longer worshipped at all. Certainly the study to uncover this mystery goes on.