Even though I'm pretty sure that its canon, DMC 2 just seems like a filler more than an actual part of DMC's storyline.
First off is Lucia. She doesn't seem like a main character because she doesn't recur in DMC 4 or in the Animate Series (not that I know of). Truthfully, if the cliffhanger in the end with her running towards the motorbike sound happens to be Dante, then she should be with him for the later part of the series, if she just happens to become an employee of Devil May Cry. If she doesn't then whatever happens to her after that is still a mystery, since she hasn't made any contact with Dante. Then there is her connection to Sparda, Matier, Lucia's supposed mother, fought alongside Sparda. Really, I can't consider this true since the legend says that Sparda fought alone. If she did fight alongside Sparda, she would've said something about her side of the story. Then again, she does tell a fact about Sparda, so whether she is telling the truth or not is really all skepticism now. This would be Lucia's only connection to Sparda (Lucia-->Matier's Daugther--> Sparda's ally), but that is severed when Arius tells her that she is artificially created, but whether this is true or not isn't confirmed (I think).
Second is the plot. It doesn't seem to fit in with the rest of the story. What I mean is, is that all the games of the series connect except for that. Here's what I mean: DMC 3 is a prequel and the start of DMC, then it continues into DMC 1 where there are hints to DMC 3, then it can continue to DMC 4 where there are further referrences back to DMC 3 and recurring members. The reason why all these three games connect is because they share hints and recurrences that can lead back to DMC 3, but DMC 2 just comes out of nowhere with a plot that has nothing to do with anything, other a few referrences to Sparda, but that is only it.
These two are the reasons why I believe DMC 2 to be a filler more than something canon. Please clear any disinformation that might be on here. Thank you.
First off is Lucia. She doesn't seem like a main character because she doesn't recur in DMC 4 or in the Animate Series (not that I know of). Truthfully, if the cliffhanger in the end with her running towards the motorbike sound happens to be Dante, then she should be with him for the later part of the series, if she just happens to become an employee of Devil May Cry. If she doesn't then whatever happens to her after that is still a mystery, since she hasn't made any contact with Dante. Then there is her connection to Sparda, Matier, Lucia's supposed mother, fought alongside Sparda. Really, I can't consider this true since the legend says that Sparda fought alone. If she did fight alongside Sparda, she would've said something about her side of the story. Then again, she does tell a fact about Sparda, so whether she is telling the truth or not is really all skepticism now. This would be Lucia's only connection to Sparda (Lucia-->Matier's Daugther--> Sparda's ally), but that is severed when Arius tells her that she is artificially created, but whether this is true or not isn't confirmed (I think).
Second is the plot. It doesn't seem to fit in with the rest of the story. What I mean is, is that all the games of the series connect except for that. Here's what I mean: DMC 3 is a prequel and the start of DMC, then it continues into DMC 1 where there are hints to DMC 3, then it can continue to DMC 4 where there are further referrences back to DMC 3 and recurring members. The reason why all these three games connect is because they share hints and recurrences that can lead back to DMC 3, but DMC 2 just comes out of nowhere with a plot that has nothing to do with anything, other a few referrences to Sparda, but that is only it.
These two are the reasons why I believe DMC 2 to be a filler more than something canon. Please clear any disinformation that might be on here. Thank you.