Alexander
Elemental: Holy
Starting Level: 25
Starting HP: 1925
Where do I get it? You have to draw him from Edea during the boss fight inside Galbadia Garden at the end of Disk Two.

GF Attack: Holy Judgement: A holy based attack effective on undead creatures or creatures affected by zombie. It doesn't seem very powerful at first but you have to build up Alexander to make it strong.

Useful Abilities: Revive is a really good ability especially later in the game since it brings a character back to life and with full HP. Then there's the Med LV Up ability which is useful on the UFO side quest and when you use the Solomon Ring. And there's also the Elem-Def- Jx4.
Ability List
Ability

Spr-J
Elem-Atk-J
Elem-Defx2
Elem-Defx4
Abilityx3
Magic
GF
Draw
Item
Revive
Spr+20%
Spr+40%
MedData
SumMag+10%
SumMag+20%
SumMag+30%
GFHP+10%
GFHP+20%
GFHP+30%
Boost
High Mag-RF
MED LV Up
AP Needed

Learned
160
Learned
180
Learned
Learned
Learned
Learned
Learned
200
60
120
200
40
70
140
40
70
140
10
60
120
Leads To...

Nothing
Nothing
Nothing
Nothing
Nothing
Nothing
Nothing
Nothing
Nothing
Nothing
Spr+40%
Nothing
Med LV Up
SumMag+20%
SumMag+30%
Nothing
GFHP+20%
GFHP+30%
Nothing
Nothing
Nothing
Nothing