The main differences are in their expressions and some minor details of personality. In the manga, Deku might seem a bit more intense, while in the anime, he's sometimes presented a bit softer.
As I don't know the 'Ray Boundy story', I can't say who Ray Boundy is in it. He could be the main character, a hero or just an ordinary person around whom the story revolves.
Deku might be completely shocked at first. Since Bakugou has always been so aggressive towards him, he would never expect such a confession. He might just stand there, mouth agape, not knowing what to say.
His friends could come to the rescue. Bakugo, for instance, might use his explosive power to break into Toga's hideout. He's always been competitive with Deku, but he also cares about him deeply.
In 'deku meets future deku fanfiction', perhaps the future Deku warns the present one about upcoming threats. He could tell him about villains he'll face in the future and how to defeat them. This would give the present Deku an edge in his battles and also in his growth as a hero.
Well, obviously Deku in two forms - the younger and the older version are the main characters. The younger Deku is the one who is still growing and learning, while the older Deku has more experience.
The main characters in 'ray ray love story' are presumably named Ray. However, there could be other supporting characters as well. Maybe there is a best friend of one of the Rays who tries to help them in their relationship. Or there could be an antagonist, like an ex - partner of one of the Rays who creates trouble for their newfound love. Without more information, it's hard to say for sure.
Well, I don't really know the specific Ray Ray and Star love story. It could be a very unique and personal story about two individuals named Ray Ray and Star who meet, fall in love perhaps through shared interests or a chance encounter. Maybe they first noticed each other in a coffee shop, where their eyes met and there was an instant spark. Then they started to get to know each other better, going on walks in the park and sharing their dreams.