You can change character's classes in between levels. To change classes the character must meet the requirements. The characters do this by having certain attributes at a certain level for having specific artifacts.

Male Classes

Class	Gender	LV	STR	VIT	INT	MEN	AGI	DEX	ALI	Items
Soldier	-	-	-	-	-	-	-	-	-	None
Fighter	Male	-	-	-	-	-	-	-	-	Short Sword, Round Sheild,Chain Mail,Iron Helm
Knight	Male	6	72	67	-	-	-	-	40-100	Baldr Sword,Armet,Kite Sheild,Plate Armor
Berserker	Male	6	72	67	-	-	-	-	0-60	Francisca,Leathor Armor,Iron Helm
Fencer	Male	6	72	-	-	-	-	62	30-100	Bastard Sword,Cloth Armor,Jingasa
Phalanx	Male	7	76	70	-	-	-	-	20-80	Spear,Large Sheild,Plate Mail,Iron Helm
Beast Tamer	Male	6	72	67	-	-	-	-	0-60	Leather Whip,Leather Armor
Doll Master	Male	7	-	-	60	66	-	65	20-80	Marionette,Amulet,Robe,Bandanna
Ninja	Male	5	-	-	-	-	52	59	0-60	Iron Claw,Ninja's Garb,Hachigane
Wizard	Male	6	-	-	57	63	-	-	0-60	Scipplay Staff,Spellbook,Robe,Amulet
Paladin	Male	15	117	103	-	-	-	89	60-100	Blessed Sword,Kite Sheild,Baldr Armor,Baldr Helm
Dragoon	Male	17	127	111	-	-	-	95	-	Sword of Tiamat,Dragon Armor, Dragon Helm
Black Knight	Male	15	117	112	-	-	-	-	0-40	Satan's Bullova,Valiant Mantle,Baldr Armor,Armet
Sword Master	Male	17	127	-	-	-	-	117	40-100	Claymore,Cloth Armor,Hachigane
Cataphract	Male	19	124	130	-	-	-	-	30-80	Baldr Spear,Tower Sheild,Heavy Armor,Armet
Beast Master	Male	15	117	103	-	-	-	-	0-45	Rapture Rose, Hard Leather
Enchanter	Male	17	-	-	110	106	-	115	25-75	Fool,Amulet,Magician's Robe, Bandanna
Ninja Master	Male	15	-	-	94	-	112	99	0-40	Baldr Claw,Ninja's Garb,Hanya Mask
Arch Mage	Male	17	-	-	123	107	-	-	0-40	Arc Wand,Spellbook,Magician's Robe,Amulet
Centurion	Male	-	-	52	62	52	-	54	-	Baldr Sword,Kite Shield,Plate Armor,Armet

Female Classes

Class	Gender	Lev.	Str.	Vit	Int	Ment	Agil.	Dex	Align.	Items
Amazon	Female	-	-	-	-	-	-	-	-	Short Bow,Leather Armor,Bandanna
Archer	Female	6	72	-	-	-	-	69	20-80	Great Bow,Leather Armor,Leather Hat
Dragon Tamer	Female	6	72	58	-	-	-	69	30-90	Great Bow,Leather Armor,Leather Hat
Valkyrie	Female	6	72	57	62	-	-	-	40-100	Spear,Round Shield,Breastplate,Plumed Headband
Witch	Female	7	-	-	65	-	-	72	0-60	Scipplay Staff,Spellbook,Witch's Dress,Pointy Hat
Sorceress	Female	6	-	-	62	-	-	-	0-60	Scipplay Staff,Spellbook,Witch's Dress,Amulet
Cleric	Female	5	-	-	59	-	-	-	45-100	Light Mace,Cleric's Vestment,Rosary
Diana	Female	17	116	-	-	-	-	124	20-70	Ytival,Hard Leather,Plumed Headband
Dragon Master	Female	17	127	112	-	-	-	113	50-90	Estoc,Scale Armor,Plumed Headband
Freya	Female	17	116	101	106	-	-	-	60-100	Thunder Spear,Buckler,Baldr Mail,Armet
Siren	Female	19	-	-	125	128	-	-	0-45	Arc Wand,Spellbook,Fur Coat,Amulet
Priest	Female	15	-	-	109	112	-	-	65-100	Baldr Mace,Robe of the Wise,Rosary
Princess	Female	-	-	-	-	-	-	-	70-100	Battle Fan,Spellbook,Pure-White Dress,Dream Crown
Centurion	Female	-	-	50	68	55	-	52	-	Baldr Sword,Buckler,Plate Armor,Baldr Helm