I think this is actually two different calls. "Kyo" and "rei." The first is "attention," the second is "bow."
Bow.
Mawatte means to turn in Karate.
REI was created in 1938.
If you mean the direction 'right', we call it migi in karate.
The word "rei" in Portuguese (sounds exactly like hey) means king.
this character name rei ayanami. i guess.
The way of the empty hand
It meas (REI) Retorno en Inversion
i don't know what you mean "karate" is a type of fighting you cant do it on moshi monsters.
you can download the anime at this site http://www.filestube.com/r/rei+rei
It is written デジレー /de ji rei/.