Finis Socius (フォー・ソキウス) is a character in Mobile Suit Gundam SEED VS Astray.
Finis Socius is a member of Librarian Works and pilots the LH-GAT-X103 Hail Buster Gundam. The Socius series of clones were Combat Coordinators created by the Earth Alliance and have genetic modification to make them subservient to Naturals. However, Finis Socius is a newly created Socius, and does not have the genetic safeguard, thus he can attack Naturals. He is also more expressive than the other Socius and is foul-mouthed.