Eve was the one who infected the computers with the virus... but wouldn't it be worse than her losing her job if her only friend at the company lost his? It may also have been Sena trying to help, I can't remember what Wolf and I had planned. But Eve was the cause of the virus.
How Eve infected the whole company could be that she got the e-mail, and opened it- then it sent itself to everyone else on the network (as her). But that would have required everyone else to have opened it up right away... unless they have some kind of IM program (it may have popped up by itself). Considering how old their computers are, they probably don't have a very good security or anti-virus setup. It may have automatically transferred itself to the other computers directly over the company network. Although I'm not an authority on this, I've never used a (non-personal) business network.
Mika is Sena's previous master. We haven't decided when she'll show up, but it'll be before the end of the third story. We wanted to introduce all of the primary characters in the first three stories.
I've been planning to change create back and forward html pages for Pulse, but it's taking some time. If you consider I have to produce two sets- one for PG, one for R, there needs to be a total of 128 pages. I have the R rated one finished, but not the PG one yet. I'll also be adding links to the other comics on the site at the bottom.
About Eve, I made a lot of changes to her while I was practicing an anime style. Most of the pictures in the gallery where made before I started PeEVEed (expect for the bunny pic), and at that time, I drew her with a rounded chin. I had asked Varchild for his thoughts on making the PeEVEed characters more anime, and he said that one of the things I should do with all of the female characters was to make their chins pointy. I did that, but it may have not been until a few pages into PeEVEed.