Klein

• Preferred IV: +SPD / -RES
• Weapon: Firesweep Bow+ 
• Assist: Reposition / Draw Back / Flexible
• Special: Luna / Moonbow
• Passive A: Atk/Spd Solo / Life and Death / Swift Sparrow
• Passive B: Chill Spd / Chill Def / Cancel Affinity / Flexible
• Passive C: Even Spd Wave / Def Smoke / Flexible
• Sacred Seal: Flashing Blade / Speed +3 / Quickened Pulse

The Firesweep Bow is an incredibly powerful weapon, effectively canceling out all enemy counterattacks. This allows Klein to go for an all-out offensive approach and thanks to his decent offensive spread, he can do so to great effect. Like all Firesweep users, Klein will be heavily reliant on his ability to perform follow-up attacks for his damage output, making a Speed boon of the utmost necessity. 

Any movement Assist like Reposition works perfectly fine here, with the choice of which to use being left up entirely to personal preference. Moonbow is Klein’s Special of choice, allowing him to do significant damage to bulkier opponents and will activate in every round of combat with the Flashing Blade, provided that he can double his opponent. However, if utilizing any other seal, Luna will be preferred over Moonbow as they will both activate in every other round of combat.

Atk/Spd Solo offers Klein the greatest boost to his offenses possible, letting him potentially reach 45 Speed unbuffed with a Speed boon and the Speed +3 Seal, but does require him to have no adjacent allies to have its effect active -- as Klein will already be away from his allies most of this time thanks to this build's offensive playstyle, its positioning requirement is negligible. Life and Death makes for a suitable alternative should Atk/Spd Solo be unavailable, granting him a strong boost to his offensive potential in exchange for a sharp decrease to his defenses. However, due to the nature of the Firesweep Bow’s effect, the cut to his defenses is negligible will generally be a non-issue since he should rarely if ever, be hit. Swift Sparrow is also an option to have Klein potentially tank a hit in the Enemy Phase but it comes with the cost of providing a slightly less powerful boost to his offenses. 

His B slot with this build is fairly flexible and is open to several different options. Chill Spd is a particularly effective option when used in tandem with the Firesweep Bow and helps secure follow-up attacks against speedy foes who would otherwise pose a threat; it also has the added benefit of potentially providing team support. Chill Def is also an excellent choice to increase Klein’s and fellow Defense-targeting teammates’ raw damage output. Other options include Cancel Affinity to help against TA Raven mages, Wings of Mercy to grant him greater mobility and flexibility in the Player Phase, and Poison Strike to deal chip damage against opponents who Klein cannot ORKO. 

Def Smoke is a powerful, albeit expensive, choice for a C slot and is most effective when using Klein alongside refreshers. Even Spd Wave is also an option to further build upon Klein’s ability to perform follow-up attacks but otherwise, any C slot that most benefits his team can be used here. 

• Preferred IV: +ATK / -RES 
• Weapon: Brave Bow+ 
• Assist: Reposition 
• Special: Luna / Moonbow
• Passive A: Death Blow 
• Passive B: Chill Def / Swordbreaker / Flexible
• Passive C: Odd Atk Wave / Threaten Def / Flexible
• Sacred Seal: Attack +3 / Quickened Pulse

A relatively straightforward build using Klein’s native Brave Bow, aiming to maximize his damage output with his first two strikes. Due to the nature of Brave weapons, an Attack boon translates to a significant +6 damage increase and is ideal in order for Klein to more reliably ORKO his opponent. It is also recommended to further augment his ORKO potential through the use of Attack buffs and the Attack +3 Seal. 

Klein’s Assist slot is open to anything, with movement Assists like Reposition being great options once again. Luna is a fantastic choice of Special to help mediate the Brave Bow’s relatively low Mt and is extremely useful against high Defense opponents Klein would typically barely scratch. Moonbow is also an option when using the Quickened Pulse Seal to have Klein’s Special activate in his first round of combat. However, if using any other Seal, Luna will always be the preferred option as they will both activate in every other round of combat. 

Klein’s native Death Blow pairs perfectly with the Brave Bow and grants him with an impressive +12 damage output increase. For his B slot, Chill Def is ideal and helps improve Klein’s individual performance significantly, lowering the Defense stat of the opponent with the highest Defense by 7 points. Swordbreaker is a cheaper and more readily available option and helps against tanky swords who require more than two hits to be taken out. One can also choose to run any Breaker of their choosing to help against a particular weapon type that his teammates have difficulty in dealing with.  

His C slot is flexible here as well and is open to any skill that best caters to his teammates’ needs. One particularly noteworthy option, however, is Odd Atk Wave. In addition to giving him a considerable boost to his ORKO potential, Odd Atk Wave allows Klein to provide team support on odd-numbered turns. Threaten Def can also help increase Klein’s damage output but it can prove to be somewhat more difficult to use and can be redundant if used alongside Chill Def.