Kirito is more of a traditional swordsman in terms of his combat style. He often relies on his sword - fighting skills and his ability to quickly analyze his opponents. Yuuki, on the other hand, has a very unique and flashy fighting style. Her movements are more acrobatic.
Guts is purely fictional. It's a concept or character that exists within the realm of imagination and creative storytelling rather than being based on reality.
The ending of the Sword God Realm was that in the process of saving the humans, Kirito and Asuna experienced many hardships. In the end, they overcame the difficulties and successfully saved the humans and returned to the real world.
Although they weren't together in real life, in the story of the novel, their feelings became deeper and deeper, and finally they relied on each other to spend a good time together.
The ending of the Sword God's Domain chapter was full of romance and warmth. The relationship between the Kirito and Asuna was also fully expressed.
Guts' story is about a man who has faced extreme hardships. He has been through countless battles, both physical and mental. He was once part of a group but had to break away due to tragic circumstances. His life is a continuous struggle against powerful enemies, especially those of a demonic nature.