No, Uther was the first Paladin. He was also a mentor to Arthas. Arthas's father was King Terenas Menethil II.
king terenas who was slain by arthas himself
you get a big strong team and invade nothrend. kill the guards and rest youll need full sterength to take down arthas Wait wait wait, you cant kill Arthas yet, the patch hasn't come out but will prbably be WOW #4.
Arthas a palladin of lorderon the now forsaken infected Undercity, Was a very good defense of his fathers city. However he felt evil voices in his head that drove him mad during his assault on northrend trying to kill a demon that lead a invasion on lorderon a while ago for revenge. When arthas came back his armor was black with death skulls. He ended up turned by the voices and corrupted by darkness the next time he saw his father. A cutscene shows him killing his father in order to make lorderon fall in The Frozen Throne. Illidan was aware of a powerful helmet as well as arthas. Another cutscene shows arthas defeat illidan. Arthas then climbs the ice temple and takes the lich kings throne for himself. Now arthas is now The lich king . The wrath part of the title of the new expansion represents arthas's own army called the scourage. It is your job to give arthas death and put him to rest before destroys the world.
Well, there are different types of seeing Arthas across WoW. There is a quest in Icecrown where you are Arthas and u get to kill Illidan, there is another one where u get to be him and kill all his soldiers and then he is in ICC as the final boss. You also see him near the end of the phased Death Knight starter area. Although you do not get to interact with him except for accepting a quest.
NO!!!! you can't Frostmourne stay's with arthas permanently
The story of Arthas is he was the Prince of Azeroth and King Valyrnn was his father, after a while when WOTLK came and and such he fought Mal'Ganis, Who was trying to take the land, He became in contact with Frost-Mourne and now he's The Litch King.
You cant really kill him because you mainly play as him but you can kill him with some of your own units. Although his spirit is transported to the altar when he dies waiting to be revived you dont have to revive him so he will remain in the altar for the rest of the level
Frostmourne
Arthas became so obsessed with revenge against the Scourge that he traded his men's lives to get to the legendary sword, Frostmourne. When he took possession of the sword, Kel Thu'zad (the lich king) took posession of him. Arthas returned to the Alliance lands (by way of Silvermoon city) and murdered his father and Uther Lightbringer. He then returned to the North (long story) and smashed the frozen throne, thus permanently joining himself and Kel'Thuzad.
Yes, Arthas Menethil is the Lich King. You can see a cinematic of the Lich Ling by clicking on the plinth of the fountain in Dalaran.
Jaina and Arthas were in a relationship for a while as well as being life long friends since childhood.