Leonidas the Spartan
Leonidas I was the King of Sparta, the country that became the etymology of the term "Spartan discipline". Leonidas reigned as the king of Sparta, but because the state of Sparta itself has fundamentally changed into a land that produced "hot-blooded idiots", it seems like he had a difficult time administrating the nation. In order to hold back an invading Persian army of 100,000 soldiers, he stood up with merely 300 men in the famous Battle of Thermopylae.
Leonidas wields a spear and shield. He excels in defensive battles, where after persevering through the enemy attacks, he would launch a fierce counterattack along with his Noble Phantasm's summoned Spartans.