Vila has been described elsewhere as an ESFP. I differ; I think he's an ENFP.
E for extrovert - obvious: he's friendly and gregarious and can't bear to be left alone.
N for intuition - he senses danger and people who can't be trusted - very often, but he's usually right. He has a fertile imagination, also a feature of Ns. Also, Ns form their world-view internally rather than based on external influences, and as I said above, Vila is consistent in his.
F for feeling - as an extrovert he shows all his feelings very openly, and uses feeling rather than logic for his decisions.
P for perceptive/playful - he's very playful, and enjoys the process rather than the end result.
What is an ENFP like? Some comments I found - I think they match Vila very well:
By the way, I'm an INTP, which is what a lot of people say Avon is. Despite my type, though I enjoyed and rather liked earlier Avon in season, I found him cold and arrogant in season 4, and often quite repellent. To me, Vila is the most attractive personality of the lot.ENFPs have a great deal of zany charm, which can ingratiate them to the more stodgy types in spite of their unconventionality. They are outgoing, fun, and genuinely like people. As mates they are warm, affectionate, and disconcertingly spontaneous. However, their attention span can be short; ENFPs are easily intrigued and distracted. Less mature ENFPs may need to feel they are the centre of attention all the time, to reassure them that everyone thinks they're a wonderful and fascinating person.
ENFPs often have strong, if unconventional, convictions and ethics.
ENFPs are pleasant, easygoing, and usually fun to work with. They come up with great ideas, and are a major asset in brainstorming sessions. Follow-through tends to be a problem, however: they tend to get bored quickly, especially if a newer, more interesting project comes along. They also tend to be procrastinators, both about meeting hard deadlines and about performing any small, uninteresting tasks that they've been assigned.
ENFPs hate bureaucracy and authority, both in principle and in practice.
ENFPs are very friendly. Most are really enjoyable people. Some of the most soft-hearted people are ENFPs.
ENFPs have what some call a "silly switch." They can be intellectual, serious, all business for a while, but whenever they get the chance, they flip that switch and become CAPTAIN WILDCHILD, the scourge of the swimming pool, ticklers par excellence. Sometimes they may even appear intoxicated when the "switch" is flipped.
ENFPs like to tell funny stories, especially about their friends.
Close enough is satisfactory to the ENFP, which may unnerve more precise thinking types. Amazingly, some ENFPs are adept at exacting disciplines such as mathematics. (Or picking locks - Nico)
Friends are what life is about to ENFPs. They hold up their end of the relationship, sometimes being victimized by less caring individuals. Some have real difficulty being alone, especially on a regular basis.