Still in my comparison between Slayers and Lyrical Nanoha, I just noticed that Lina and Nanoha-chan are pretty much alike:

Nanoha and Lina are two intelligent, talented and ridiculously powerful girls. They're both the main character of their respective animes, and they're both there to save the world.

They're both good at handling/managing people. Hey, Lina travels with Naga, Amelia, Xellos, etc., without becoming crazy or killing them. That's impressive.

They're both good at transforming foes into allies (Fate, Vita, Xellos, Zelgadis) or acquiring friends through battle.

Lina is a bit dangerous to live/travel with, since she's kinda short-tempered. But then again, Nanoha is also really scary when angry.

None of them is scared of fighting and lauching powerful spells.

And basically, I wouldn't want any of them as an enemy.

lol. very good stuff Fabien.

I like both, but for different reasons. As for similarities, I agree with all of the above, but I still think they are more different than similar. With Nanoha, I always get the purified, innocent, and reserved feelings. Sure she can go all out at times but that's not her nature. It's an exception rather than the norm. For Lina, it's always time and time again an expressive and explosive personality. She's like the character that you either really really hate or really really love. She either enthralls you with her b*tchiness (:P) or she turns you a mile away.

Basically, I think they have different endearing qualities. I just don't see another Lina Inverse character anywhere else though. :)

I can't let you use the word "b*tchiness" about Lina.
She's sociable (like I said, she did befriend Naga, which is no small feat), she truly cares for her friends, she's resolute (she can work very hard to attain her objectives). Just like Nanoha.

Slayers is a humoristic show. You can get caught in a huge explosion (like the village elder at the end of episode 1) and just get your face and clothes a bit dirty. So, Lina's explosive (litterally) temperament is mainly due to the genre. You can compare it to how Kaname hits Sousuke with her fan all the time in "Fumoffu".

Also, Lina is an adventurer, she has to find a way to eat every day. Nanoha doesn't have that kind of problem to consider, since she has a stable situation (first a girl living with her parents, and then a TSAB employee). So, lots of their differences in life are due to circumstances, not to what they are deep down.

Lina and Nanoha are two sensitive, caring, strong-willed, smart young girls. The "sweet" side of Nanoha tends to let the viewer forget how mentally strong she is, while Lina hides her sensibility with either laughs or anger. But IMHO it's mainly due to their respective environments.

Well, in conclusion, I like them both, for the same reasons.

Two screen caps to illustrate my post...