Ryu would never call himself Ryu-kun, or
Ruy-san, and especially not Ryu- samma. It
would be considered extreamly rude and arrogant
to use titles when refering to yourself. Ryu
would introduce himself as Ryu Taro; people
would refer to him as Taro-san [if they knew
him casually;note the use of his family name;
friends would use this in a work school
environment as well. This is what Mihoshi and
Kiyone would call him.
Ryu-kun is what his friends and family would
likely use considering his age. [His mofher
would probably use Ryunosuke-chan, since she
still sees him as a young boy.
Underclassmen [in school would use
Ryunosuke-sempai, and people who are socially
inerior [Ryu talking to his father] would use
the title -samma.
It should be noted that Kun is masculine and
would not be used by a very feminine character
to reffer to another girl. It is by no means
exclusively male. [Tomboys, boys referring to
female friends.
-Chan is also used as a term of endearment
towards a member of the opposite sex, a
sibling, or a pet.
In relationships [i.e.dating] the male would
use -chan and the female would use -kun
[common] or-chan [uncommon].
hope this helps a few people out.
ja! Carrot glace.