Newtype USA October 2004 pg 33.

How to make a king
   Being called a doofus by one of the most attractive people in the world 
is enough to get any guy down, even if said knockout is actually another male 
who also happens to be your accidental fiancé (Yuri's been having all sorts 
of problems with the "local customs" lately). The poor boy's ego took a big 
enough hit when he was flushed down the toilet and into another world where 
they wanted to crown him Demon King. He really doesn't need Wolfram's words 
shattering his self-esteem any further.
   Yuri may need to chant a few self-help mantras, but there are times when 
an (almost) majestic aura surrounds him. The sight of injustice whips him into 
a fury, triggering his demon king mode. So don't make him angry. Trust us, you 
wouldn't want to face him in a fit of rage.
   "I'm careful to portray the gap between the Yuri Shibuya people normally 
see and the Demon King inside him," says Yuri's voice actor, Takahiro Sakurai. 
"He doesn't have any memory of the time he spends in Demon King mode, which 
means I have to be even more careful. I use all sorts of tricks like changing 
my intonation and lowering my voice till it's almost scary in order to make him
sound more solemn. I mean, he is a Demon King, so a voice that scares people 
seems just about right!"
   But Yuri doesn't seem to have any of the normal kingly attributes like 
strength or cunning. The only things he really has going for him are his aptitude 
for baseball and a slightly overdeveloped sense of justice. How do you turn a guy 
like that into a king?
   Maybe people like Wolfram and Josak are the key. Their sharp words and harsh 
treatment might be just what Yuri needs to rid himself of his doofusness and 
become a decent ruler. If they keep at it, they may make a man of him yet!