Naomasa Ii

Naomasa Ii (井伊直政) is a loyal vassal of Ieyasu Tokugawa and one of the Four Guardian Kings of Tokugawa. His army's armor was painted crimson in battle, giving them the nickname "Ii's Red Devils".

Samurai Warriors
Naomasa is briefly mentioned in Samurai Warriors 2. For the Eastern Army scenarios, both he and Fukushima will carelessly charge for Mitsunari's camp with little regard for their safety. Ieyasu will request for the rest of his army to ensure they don't let their zealousness get the best of them. Should they fall, Mitsunari will state that the Four Generals of Tokugawa are highly overrated and ally morale will suffer.

Kessen
In Kessen, Naomasa is one of Ieyasu's starting officers. He leads a skilled cavalry unit and is one of the speedier troops in battle. He reports to his lord that the Western Army were marching the night before Sekigahara and requests permission to be the one to lead the charge against Mitsunari's camp. He's interrupted by an infuriated Fukushima and, after the latter's outburst, is asked to stand down. Should Ieyasu lose at Fuji, Naomasa and another one of Ieyasu's Four Generals, Sakakibara, volunteer to lead the rear guard for the army's escape. They're surprised when their lord stays with them for the assault.

Naomasa is eventually replaced by his son, Naotaka. This happens whether or not Ieyasu has been consistently winning his campaigns. One reason, like Honda, is due to their historical death date. If Ieyasu suffers a string of loses, Naomasa will be killed whilst serving as the rear guard. His son swears to avenge his death by taking Mitsunari's head.

Saihai no Yukue
He appears as an enemy general in Saihai no Yukue. Naomasa is a bold and enthusiastic general who acts like the modern day superhero. He believes he is the harbinger of justice and thinks Ieyasu to be a fair man. Although initial reports stated that Fukushima would be the one to charge Mitsunari's camp, Naomasa is actually the first general to arrive.

Quotes

 * "The Crimson Men are always ready!"
 * Ii agreeing to attack; Kessen