OMGWTFBBQ

http://en.wikipedia.org/wiki/List_of_Mega_...characters#Solo
Skip down to "Hollow." Read the second paragraph.

Quote (That Wiki Entry)

Hollow is actually Altair (Hiko in the Japanese version),

OMGWTFBBQ.
Altair is one of my favorite characters. .__. (Assassin's Creed)

Another funny thing I found was that in RuroKen, where I GOT my namesake, there actually IS a character named Hiko. Hiko Seijuro. It's Kenshin's master for Hiten Mitsurugi-Ryu, the fabled art form [/rambling]...
But you must imagine how much I laughed at that...

Anyways, kudos to Zero for finding that entry. :'D
Ow! Spoilers!
Fucking Star Force is making me rethink navi names. Jerks.
It's not a spoiler if you don't know who Altair IS.