This artwork and Bio data are early Square Enix ideas regarding Cloud.
Translated from "Final Fantasy VII Ultimania Omega" by Lifestream.net

Cloud

Job: Mystic knight Age: 21 Weapon: Swords, katana

Protagonist. Ex-SOLDIER. Now a wandering ‘jack-of-all-trades’. Employed by rebel group AVALANCHE. Symbolized by the large sword held on his back by magnets.