Many people here have pointed out how fun and bright Karlach is, but that's just one side of her.
Her character explores how a good person deals with a truly bad hand. If you pay attention to her, you'll notice some contradictions.
She'd rather die than go back to hell, but she also desperately wants to live. She always cheers us on, but she's also envious that we'll get to go on without her. She doesn't wish to drag anyone down with her, but she's also glad that she's not alone in Avernus.
Her desires and vulnerabilities are easy to miss behind her hells-yes demeanor.
That Larian and Sam managed to craft such a deep character in the last minute is a testament to their ability.
As for how Karlach talks, she's not any more or less "modern" than the rest of the cast. She's simply more direct, and less prone to flowery language. This stems from her upbringing.
She's a kid from the streets who never really had a chance at a normal life. If you listen to how the tiefling kids talk, it's not very far off. They don't talk like Dickensian street urchins, that's for sure.
Lae'zel's voice is similar to Karlach's, but her speech is laced with githyanki expressions and a foreigner's turn of phrase that makes her sound more exotic.
The rest of the cast also talk "modern" but with an expanded enough vocabulary that it sounds more period than it really is. If Larian actually went medieval, it would've been insufferable, so props to them for not doing that.
Edit: Even Peter Jackson's Lord of the Rings trilogy doesn't go full medieval, and that one goes way, way harder than BG3. The way Gimli and Aragorn talk is a night and day difference. If Larian gave Karlach a thick Welsh accent, she would've pretty much been Gimli.
Last edited by Walking Kole; 29/10/23 09:38 PM.