i tried the npc hack and it's funny,

after i use the telepipe to go back to pioneer. the character that
start the quest disappear! gone!!! but for the second player is
a empty screen. then i went to the guild there i saw Elly. after
talking to her i went to find her in the ruin. i cannot read a thing
though becausae the text is up in heaven and i am on pioneer.

for some strange reason i can control elly to drop her sword.
then i exit the game and the character that start the quest become
elly. but not at original level, instead it s level 45 or 50 i think.
but that was Elly's level. oh i can't control elly at the time, but
i was ALLOED to access her menu and drop equiment that is all.

i dont want to play as npc, i just want my character appearance change
that is all. was that not the right hack?

It will overwrite the original character with the new level. Only use it on a new character.