I'd rather do her personality before I try to design her, because I need inspiration. x)
Some just call her Flu because that is her most common form.
Virus never likes to hang around one person for too long; she is constantly moving from person to person, playing with somebody all day one day and then not even talking to them the next. Because of this trait, people tend to avoid her, but she still cluelessly tries to make friends, abandoning them when they really need her. This is probably why she is still single, and why she is so lonely all the time. She is aware of what she does, but she hates it, which causes her to be stressed out and then she does it more - all a vicious cycle.
Upon meeting someone new, Virus is friendly - sometimes too friendly. Although the newbie usually soon finds out from others about Virus's problem, and so they learn to stay away.
In a nutshell, Virus acts happy-go-lucky and rather silly when she's not running away. She prefers that people underestimate her, because she figures being underestimated is safer than being fairly judged, so she 'plays dumb' a lot of the time. She's also very touchy-feely, and isn't afraid to get physically close to somebody.
When she's been around someone too long and can't run, Virus gets very awkward compared to her normally goofy and funloving self. This is usually the point that people leave her when she does make an attempt to get close to people - she gets extremely quiet, defensive, and clumsy, which leads into an argument and then the end of a short-lived friendship. Nothing ever keeps her down for long, though - she has a way of getting around pain, bottling it up and storing it in some untouched part of her soul. However, bottling up is never good, and Virus will eventually learn that the hard way.
If Virus tries to make long-term friends with somebody and they abandon her, she loses all feelings for them, probably due to her "bottling up". Sometimes she'll even become angry with them, although she never confronts these feelings directly - rather, she's a backstabber. She's an extremely good actor and smooth-talker, and she knows how to find things out and use these things to hurt people. Because of this dark side, she's gained a lot of notoriety among those she has hurt - however, a lot of spirits can't believe that fun-loving and dim-witted Virus is capable of causing such harm.
Virus has a dark little secret that very few people know - she has a strange fascination with hurting things. She's not necessarily the kind of girl who keeps victims in her basement and tortures them, but if she were to find something suffering, the chances of her helping it rather than watching it die would be slim to none. Of course, one has to be interested in suffering to be in Virus's line of work - causing worldwide virus outbreaks isn't for the faint of heart.
In a nutshell//
Misunderstood lonely girl or a truly evil person? She seems to be walking a fine line between both...
As was said before, Virus is quite the sadistic girl.
As long as she feels like she's not getting too close to somebody, she's fine.
She loves just completely letting lose, and it gets rid of her stress every once in awhile.
Her one real talent, she's into a robotic-popping style. Of course, she only really gets to practice on Earth where music technology is more advanced.
-Making humans/animals sick
One of her favorite activities, which also happens to be her job. To do this, she'll start in her basement, brewing up some new kind of virus, the severity of it depending on how much population control Mother Nature wants. Then she'll go to Earth and spread it by inhaling the virus and then coughing on someone. She'll stalk that person for a few days to make sure the virus is spreading properly until she returns to Eloria, awaiting the next order of viruses.
She may just hate solitude more than being abandoned by a friend. She hates being alone and lonely, although she finds herself there a lot.
She also hates this feeling. It just naturally stresses her out for some reason.
She only dislikes them because she was raised to. Her parents figured you can't destroy something you like, and so they trained her to think of them as pests that need controlling sometimes.
As was said before, robotic popping is her thing. Mostly to dubstep.
-Hanging out in public places
Although she usually finds herself alone, she likes being around people. Sometimes she meets new ones, but they never last long.
-Getting herself sick
Sometimes she does this just for kicks. She never gets the other spirits sick, but when no humans or animals are available for testing she needs someone to test on...
Other: Not that I can think of right now. 8D