Right, the diary would keep him from getting manipulated.. Also, Saharah can turn into kid which is a HUGE plus point <3
And the diary should be in his foreign language so no one but him could read it
Suu needs to go Memento and start tattooing the important stuff on his body. Maybe a tattoo that says "Suhara is an adult dragon stuck in a kid's body" and "Jin is a conniving sob". "And if you're reading this for the first time, Jin healed you and now you forgot everything. AGAIN."
OMG this is brilliant
But Suu could get punished if the diary found out
Suu seriously needs to keep a secret diary so he gets to write down everything he does and check if he does forget any memory, and from there work things out. He should also write from his mother tongue so no one gets to understand what he wrote (though I doubt Suu remembers how to speak and write from his mother tongue).
Somehow, I kinda like Sahara more than Prince Hwaryeon. Seriously, Sahara is pesky and literally is sucking Suu's life force but not enough to kill him. But the prince? He doesn't give a damn if the dragon needs to eat Suu at all, and Sahara has never physically hurt Suu, so I'm more on Sahara's side right now.