Some loose stats I would use for Kenshin Characters:
Kenshin (Young Idiot

): Mnk6/Rog2. Align LN
Stats (Elite Array): Str 12 Dex 15 Con 10 Int 13 Wis 14 Cha 10
BAB: +5
Feats: Improved Initiative, Quick Draw, Weapon Focus (Katana), Mitsurugi Style Feat, Dodge, Deflect Arrows, Mobility.
Class Abilities: Monk AC Bonus (Wis+1), Unarmed Strike (1d8), Flurry of Blows, Evasion, Still Mind, Ki Strike (Magic), Slow Fall 30 ft., Purity of Body, Sneak Attack +1d6, +20 Movement.
Kenshin (Battosai): Former Monk6/Brb2/Rog4. Align: CN
Stats: Str 12, Dex 16, Con 10, Int 13, Wis 14, Cha 10
BAB: +9/+4
Feats: Improved Initiative, Quick Draw, Weapon Focus (Katana), Mitsurugi Style Feat, Dodge, Deflect Arrows, Mobility, Spring Attack, Blind-Fight.
Class Abilities: Monk AC Bonus (Wis+1), Unarmed Strike (1d8), Flurry of Blows, Evasion, Still Mind, Ki Strike (Magic), Slow Fall 30 ft., Purity of Body, Sneak Attack +2d6, Uncanny Dodge, Improved Uncanny Dodge, Trap Sense +2, Rage 1/day, +30 Movement.
Kenshin (Ruroni, before Kyoto Arc): Mnk6/Brb2/Rog4/Iaj4. Align: NG (Despite not being Lawful, Kenshin learned to be a Iajitsu Master).
Stats: Str 12, Dex 16, Con 10, Int 14, Wis 14, Cha 10
BAB: +13/+8/+3
Feats: Improved Initiative, Quick Draw, Weapon Focus (Katana - Reverse Blade), Mitsurugi Style Feat, Dodge, Deflect Arrows, Mobility, Spring Attack, Blind-Fight, Combat Expertise, Improved Trip.
Class Abilities: Monk AC Bonus (Wis+1), Unarmed Strike (1d8), Flurry of Blows, Evasion, Still Mind, Ki Strike (Magic), Slow Fall 30 ft., Purity of Body, Sneak Attack +2d6, Uncanny Dodge, Improved Uncanny Dodge, Trap Sense +2, Rage 1/day, +30 Movement, Weapon Finesse (Katana - Reverse Blade), Canny Defense, Lightning Blade.
Kenshin (Ruroni, after Kyoto Arc): Mnk6/Brb2/Rog4/Iaj8. Align: LG
Stats: Str 12, Dex 17, Con 10, Int 14, Wis 14, Cha 10
BAB: +17/+12/+7/+2
Feats: Improved Initiative, Quick Draw, Weapon Focus (Katana - Reverse Blade), Mitsurugi Style Feat, Dodge, Deflect Arrows, Mobility, Spring Attack, Blind-Fight, Combat Expertise, Improved Trip, Improved Critical (Katana - Reverse Blade).
Class Abilities: Monk AC Bonus (Wis+1), Unarmed Strike (1d8), Flurry of Blows, Evasion, Still Mind, Ki Strike (Magic), Slow Fall 30 ft., Purity of Body, Sneak Attack +2d6, Uncanny Dodge, Improved Uncanny Dodge, Trap Sense +2, Rage 1/day, +30 Movement, Weapon Finesse (Katana - Reverse Blade), Canny Defense, Lightning Blade, Strike From the Void, One Strike/Two Cuts.
This may not be the best way to stat him, because he really should be faster and tougher (higher Con and Cha). I put the 8 in Con or Cha and the 10 in the other, but bumped either one to 10 by 8th level. Then points went in Dex, Int, Dex. I'm not sure what the Mitsurugi Style Feat would be, but something along the lines of speed. Also, instead of one of his later feats he may have a Mitsurugi Mastery or something.
He could go into rage during his Battosai years and during his wandering (usually only at the prodding of Saito) but after Kyoto he returned to lawfulness, never to rage again.
Technik