The Nameless King is also a fascinating boss NPC. He was once a great dragon - slayer and a hero. However, he turned against his own kind and allied with the dragons. His story is a tragic one of betrayal and a search for a different kind of power. His battles in the skies and on the ground are a reflection of his dual nature as both a man and a dragon - rider.
The Pinwheel boss in Dark Souls is often seen as one of the easier bosses in the game. It's actually a necromancer. Pinwheel uses magic attacks mainly. The story goes that it guards the Catacombs area. It might be related to the undead and the dark magic that pervades that part of the game world. It's sort of a guardian of the secrets and the dead in the Catacombs.
One of the most memorable boss fight stories for me was against Ornstein and Smough. It was a battle of endurance and strategy. I first focused on Ornstein as his attacks were more predictable. But when I got him down to low health, Smough absorbed him, becoming Super Smough. His attacks became more powerful and had a wider range. I had to constantly dodge and look for openings. Eventually, I managed to defeat him after many attempts, and it was a huge sense of accomplishment.
Well, one of the best moments was when an invader used the environment to their advantage. They lured the host into a narrow corridor filled with traps. The host, not suspecting a thing, followed. Once inside, the invader triggered the traps and then attacked the disoriented host. It was a really devious but effective strategy.
One of the best Dark Souls 3 invasion stories I've heard was about a player who invaded another's world right as they were about to face a tough boss. The invader didn't attack immediately. Instead, they watched as the host struggled with the boss's first phase. When the host was on the verge of death, the invader suddenly jumped in and helped them defeat the first phase. Then, just as the host was thanking the invader in confusion, the invader turned on them and won the fight. It was a really clever and unexpected strategy.
The story of Artorias is also among the top. He was a great knight who ventured into the Abyss to fight the Darkwraiths. His loyalty to his wolf companion, Sif, and his selfless act of sacrificing himself to keep the Abyss at bay are truly heroic. His tale is filled with themes of courage, sacrifice, and the fight against the encroaching darkness in the Dark Souls universe.
The Lothric Princes have a complex story. Lothric, being the younger prince, was prophesied to link the fire but he refused. Lorian, his older brother, was strong and protective. Their story shows the struggle against the cycle of fire - linking that has been a central theme in the Dark Souls series. They are found in Lothric Castle, and their combined form as a boss is a result of their intertwined fates.
My favorite has to be the Artorias of the Abyss fight. Artorias was a tragic figure. His moves were so fluid and his attacks were strong. He seemed like a force of nature. I remember his leaping attacks and how I had to time my dodges perfectly. The atmosphere of the fight, with the dark abyss all around, added to the tension. I felt like I was in a real duel with a great warrior. I had to be patient and wait for my chances to strike back. After a long battle, I emerged victorious, and it was a fight that I'll always remember.
One great 'Dark Souls 3 Crossover Fanfiction' is 'The Link in Lothric'. It combines the world of Dark Souls 3 with The Legend of Zelda. The author does an amazing job of integrating Link's abilities and character into the dark and unforgiving world of Dark Souls 3. It's full of exciting battles and interesting interactions between the two different universes.
One great 'Dark Souls' romance fanfiction is 'Soulbound Love'. It beautifully weaves a story between a chosen undead and a key NPC. The author creates a believable connection between the two characters that draws you in.