multi-blogs on one site

If I have multiple blogs on one www.ads-software.com site, can each of those blogs use a different theme?

I want to do this as I am planning a transmedia storytelling campaign. I want to have a centralized place where users can go and click on a different heading to get to each character’s blog. Each character needs to have a blog ‘theme’ appropriate for his/her personality.

Any other suggestions of how I do this? Obviously, I could have different, isolated blogs … and maybe ‘curate’ their posts on something like Storify….????

Thanks for any hints, ideas…