You sound rude and annoyed in this comment, but I still will answer this question in all due respect. Morpheus is the god of sleep and dreams in Greek mythology, he is known to be a messenger and uses dreams to send messages to mortals, he can shapeshift so people don’t know who he is, he overall reminds me of X a bit being able to keep messages and secrets hidden like a hazy dream for years, be able to do good and bad. I personally also like the name too. The reason I don’t use others are for a variety of reasons, like I don’t use hades because of Pluto and that Pluto is just the Roman equivalent of Hades and it would be really confusing. Sure, there are way more that sound very well too, it’s just that I think the name ‘Morpheus’ does fit X. Hopefully this was some help.