Um, Lev? Not to burst your bubble, but you can't really, you know, work your way around basic science. Water is a weakness to lightning. Pretty much the end of the story.
Only because you choose to think of it that way. Water is merely a conductor of electricity. Assuming you don't use your elemental powers, there's no reason for it to harm you. Now obviously somebody without proper training couldn't use electricity powers while submerged or in contact with water without electrocuting themselves. However, once you've been around it that long, you would learn to know how to use it to your advantage, as anybody who knew what they were doing with an elemental ability could.
Assume, for instance, that you're in a rainstorm, on a boat, in the middle of the ocean, fighting a Kraken. That would be a bad situation, and would hinder you to generating electric fields at an area away from yourself. On the other hand, let's assume you're walking in a street full of puddles on Stelt. Then, it would be quite easy to make that into an advantage while facing off adversaries by blasting lightning at their pool while you're in your own. Or, perhaps, stopping people from close by sending a charge through yourself, enough to cause minor shock but not harm, while being really bad for them. Natural electrical resistance and all that.
Of course that's the reason. You're not just trying to avoid giving your character a weakness.
I'm sorry, but no. If Lev was on a boat he must have had a pretty bad time, water being a weakness to him. But he's not invincible. Basic weaknesses are basic weaknesses.
Yes, because a pre-established back story that I've used for a couple dozen variations of the same character along the lines of "this is cool, he's 90,000 years old, so let's be a smuggler/adventurer for part or half of that life span" was generated simply to work around a weakness that would be brought up a whole year later in order to go against what a bunch of other people thought"
As it so happens, Levacius does happen to have his own weaknesses. Then there's also the weakness known as 'player isn't going to metagame and immediately figure out the weaknesses of other people', but I don't think that constitutes as one.
Now, what it boils down to is if you can give a logical weakness why water in and of itself would be a weakness to anyone other than the Wicked Witch of the West, I would be willing to listen. But another thing that this all boils down to is that accepting a natural elemental weakness as a feasible weakness is somewhat silly. It comes with the job description. I'm well aware that using lightning powers in the middle of a pool would be dangerous and stupid, but that's hardly an actual character weakness.
While a number of people here claim that stating a physical weakness in a profile is necessary, it's really not. All that it means is that characters can just throw together something like 'oh, I can't use my powers when submerged' or 'my ice melts when I'm on fire' or something that should be obvious. As a role-playing game, any weaknesses should be along the realms of personality and the actual characters psyche to constitute as something going above and beyond what that character is. Thus, a weakness, like everything else, should be part of what makes that character unique. If you give every single member of the same element the same weakness as part of their actual 'weaknesses', then it just means that you've got yet another thing that is copy-pasted from every other member of the same element.
This is, of course, completely ignoring my own opinion which is that such things would be an actual part of the 'Personality' or 'Powers' thing of character, and that any other major weaknesses are up to their own discretion in order to flesh their character out further as a completely optional and voluntary thing.
Also, what Blade said. Levacius knows well the electric eel maneuver when you're desperate.
-Toa Levacius Zehvor