I mean, I see them as friends but I don't know how well these two would work as a couple. Twyla is shy and, for the most part, prefers to stay in the shadows and go unnoticed by the majority of people at Monster High. Spectra, on the other hand, is one of the most social ghouls you will ever meet, not to mention the writer of The Ghostly Gossip. My thoughts on this ship are a bit hard for me to put into words, so the best I can say is:

Conclusion: Awesome friendship, but nothing more.