It's hard to say for sure without more information. But if it follows the pattern of previous Guilty Gear games, Sol Badguy might be one of the main characters. He has been a central figure in the series, with his complex past and powerful fighting skills.
Sol Badguy is a great choice. He has a really cool design and a powerful backstory. His hot - blooded personality would make for interesting interactions in any crossover. For example, in a crossover with 'Dragon Ball Z', he could have an intense battle with Goku and then end up respecting each other's strength.
Ragna the Bloodedge is another one. He is a central character in BlazBlue, and fans like to see how he would fare against the Guilty Gear characters. His tragic past and his quest for revenge can add a lot of depth to the fanfiction stories he is involved in.
Some of the main characters include Sol Badguy. He's a central figure with a complex past. Another is Ky Kiske, a noble - hearted fighter. There's also May, who is a feisty and determined character.
The story length of Guilty Gear Strive varies depending on how quickly you progress and how much you explore the side quests and details. But on average, it can take around 10-15 hours to complete the main storyline.