Arche (various mage-archer type playstyles): Fire arrow point blank into enemy's throat, kick them onto their back, then swing bow downward with a flourish, smashing their trachea
Librari (a wizard, obviously): Stagger enemy with Lightning Bolt, lift them by the collar, Incinerate straight into mouth, blasting off head
Arcturus (Imperial Sorcerer): Every kill is a fatality already
My current character, Aubin, a Nord hunter would do either of these things to his prey:
1. Hatchet to the chest knocking them onto the ground. He then jumps on top of them and pulls out his steel dagger and begins skinning, while they are still alive. Trophies are always a must have.
2. Whistle for his hounds as he beats his opponent with the crossbow. He then secures them to a nearby tree with a crossbow bolt through the hand as he then proceeds to sit back and watch his hounds enjoy their dinner.
I've got a few characters that could pull off some satisfyingly brutal fatalities. Oh, this is gonna be fun...
His first fatality would illustrate his uncanny strength: he would start by viciously beating his opponent to the ground, audibly snapping bones in the process; he would then proceed to tear the rib cage from his enemy's chest with his bare hands and shove it in his enemy's skull, splitting it in half.
His second fatality would incorporate his arsenal and Apache influence: he would throw his twin tomahawks into the enemy's arms, severing them from the body; after this, he would rush forward and kick his enemy to the ground, then pull out a knife and aggressively carve the scalp from his still-living adversary. Finally he would kill his opponent by viciously stuffing the knife in his/her throat, then get up to his feat and yell victoriously whilst lifting the bleeding scalp over his head.
Rikka
Her first fatality would illustrate her stealthy nature: before the eyes of her dazed adversary she would vanish in a puff of black smoke, leaving her opponent confused; then her katana would cut through the enemy's pelvis and cut upward, mostly cutting the body in two before Rikka finishes the move by skillfully rending the remains of her enemy's head from what remains of his/her shoulders.
Her second fatality would showcase her very grim personality: she would immediately slice one leg from her opponent, who would stagger back and try in vain to stand as Rikka sadistically observes the opponent's reaction, before slicing the other leg off. The opponent would back away on what remains of his/her hands, as Rikka calmly approaches and watches her adversary's desperate attempts to escape. Finally she raises her blade and plunges it into her enemy's heart, then assumes a traditional samurai-esque position as the announcer declares her victory...
My werewolf's two finishing moves (Not that werewolves need them but hey...) would be these.
First he would stamp on his opponents foot and while pinning the foot to the ground, give three deep slashes from the groin to the neck tearing through Armor, skin and bone. The three strikes would take less than a second leaving a bloody mess to fall on the floor.
The second would be simply pinning the opponents arms to its sides then lifting it right up in the air and literally biting the face off. The opponent can scream for a second until the fangs crunch through the skull. The body will then drop to the floor with just the back of its head attached.
Oh, where do I begin?
Marlyn Droth (Dunmer Knight):
1. He would smash the edge of the shield against the enemy's face, causing them to keel over, stab him in the face with just the tip of his sword, and rip his jaw out in half
2. He would transform into a Vampire Lord, disembowel the poor bastard, and then finally simply pick him up and eat him alive, face first.
Valyndra (Bosmer Assassin/Archer):
1. Shove her dagger down between your collarbones, pull the dagger downwards to cut your chest open, and then literally eat your heart, Green Pact style
2. Stab an arrow into your eye, pull out your brain (the remains of it, at least), simple as that
Alendil (Altmer Arch-mage):
1. Shove his hand into your chest and then cast Fireball from within. You know what happens...
2. He would speak Draconic until you literally shattered (not melted, not disintergrated, not even exploded, SHATTERED)
K'dar'jo (Khajiit Unarmed):
1. Shove his clawed hands into your eye sockets, and pull apart your skull
2. Rip your spine out and beat your (immobile) half-corpse until you broke apart
Aelia (Altmer Spellsword/Master Artisan)
1. Rip a good chunk of your skull off with her mace in one swing
2. Use her mallet to "hammer out the kinks" on your face
Helmond (Breton Battlemage)
1. Kick you on the ground and cast a rune on you, then blow it up with a one word shout as final middle finger
2. Rip your heart out, squeeze the blood all over your face, and force you to choke on it
I could do this all day
1. Plague Bringer/Plague Warder (Nevoth Castore)
2.Bounty hunter/Myth slayer(Rymon Heartfell)
My character is a cold eyed killer with a taste for simple, but effective, strategies when it comes to killing...
So I would say Asodur's fatality would be in the cool simple style, as multiple of the kills seen HERE!!!!!, followed by a grim grin.
Because I have so many characters, I'll only bother with my favorites so far
Rosanna Keyrbinz, Infiltrator: Sword cut slicing off the left arm, two stabs to the chest, followed by a boot to the face, stab the face, finish with ripping the sword from the victim's face to groin
Rsalni, Maiden of War: Disarm the enemy, catch their weapon with left hand, cut them with both weapons in an X motion. Grab their head and fry them with lightning until their head pops
Ogra-Galushnub, Adventurer/Smith: Jab them in the gut with Volendrung, boot them in the head. While they're down, bring Volendrung onto their stomach, then cut their heart out with a dagger
Redrek, Thalmor Hunter: Cast a paralyze spell. Run them through with sword thrice, then decapitate. Cut the head in two while midair. Shove the body over
Backhand with gauntlets, really hard. While they're on their knees, stab them in the back, all the way through, leave it in. Snap their back via foot on back and pulling. Pull the sword out, stab em again, then smash them in the back of the head with the hilt
Azarath, Undertaker: Good ole dagger through the jugular, followed by a Sunfire to the decayed face