It's such a shame. The Organization used to be the rope that bound us together. - {{{time}}}
You're 100% sure that it's Arc, correct?
KrytenKoro - "Punch your lights out, hit the pavement. That's what I call entertainment. Causin' problems makes you famous - all the violence makes a statement." TALK -
Talk:Behemoth. Not 100% until I can translate the journal entry, but "Arch" simply doesn't make any sense in relation to the character, while Arc references quite a few things about it.
Kharon - "Not even the deepest darkness can shroud the connection our hearts share." TALK - "My inner darkness saved me when I needed help the most."
Prehaps the name is refrencing arch as in a kind of rank.
DoorToNothing — I dreamed last night... I got on the boat to Heaven!
And by some chance, I had brought my dice along!
I think it means Arch, as in a high rank. Remember, the Kingdom Hearts series has many relations to the Final Fantasy series, and many of the powerful enemies from all games contain the word Arch meaning a high rank or power over those similar.