h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

The fun here is to say which Buffy goodie you think rocks and which was the worst goodie and if you could make your own Buffy goodie what would he/she be in demon or human wise,what power would he/she possess and how would he/she fit into the series (meaning what role will he/she play? ie.. vamp slayer or demon hunter etc) and not to forget to give him/her a name.

I have a Buffy goodie/baddie in mind but I would've liked to play out the role.
This person is Spike's brother...I haven't been able to think of a name for him yet but Spike's brother comes back from the dead but in a new vampire form known as a super vamp...
The story is that Spike's brothers corpse was experimented on by using a vampire and magic and fusing them together into Spike's brother to create this super vamp...but the experiment didn't go aswell as planned...the experiment was to make him into a full super vamp but it only worked by half.
Spike's brother is good but can only turn super vamp in certain situations (by some trigger such as an accident) and when he does change he turns evil,his hair stands up and turns a red colour along with his eyes...the scooby gang would at some point discover that when he turns super vamp he thursts for destruction and he's invincible in that state and can shoot lasers and fire balls out of his hands and eyes...and the scooby gang would also later discover that the more Spike's brother changes the more the super vamp takes over him and Willow figures the only way to stop this is seperate the two and imprison the super vamp....but when the process is completed Spike discovers his brother is dieing without the super vamp and the only way to stop this is to make him into a vampire.

and the super vamp will return