Well, the character designs from my webcomic were inspired by many things, I'll go over them in a sec.
The guy on the bottom-left wielding a sword is called Frederick and he's the main character of 'Age I- Age of Darkness'. His character design (and first draft, especially) was inspired by Jonathan Joestar from the manga/anime series Jojo's Bizarre Adventure. My story was originally an rpg maker game and I remember using the character generator to actually get some inspiration.
The guy with orange-hair is called Nigel and he's Frederick's brother. His design wasn't inspired by anyone in particular and I just made it up on the character generator. With time, I ended up changing him and making his design a bit different and more personal.
The guy in the center with red hair is Drake and his design was inspired by rpg maker's character generator too. Just like Nigel's design, I changed it more and more over time.
Now, the guy standing in the back with the green shirt is named Kay and his story is a bit more complicated. He was created a loooong time before 'Age I- Age of Darkness' was even conceived and he used to be my old youtube and Google avatar (I think he still is on my second channel, actually).
On day, though, I decided his character design was too cool to be wasted and so I created a story for him. After sometime (and making his design a little different), I finally ended up putting him in 'Age I- Age of Darkness'. Sooo, now you know the reason why he's the most different-looking one in the cast. The story behind him is pretty complicated and I don't think I'd be able to tell it all lol.