Baldur's Gate 3 - How To Romance Karlach

gamespot.com:

Romance Karlach in Baldur's Gate 3 by showing her your fiery passion.

By Jason Rodriguez on

Baldur's Gate 3 has several companions that offer unique romance options. One of these is Karlach, a Tiefling who has battled her way out of the depths of hell. From the fires of Avernus, you might be able to rekindle that fiery passion through your deeds. Our guide discusses how you can romance Karlach in Baldur's Gate 3 by looking for Infernal Iron and related items. Likewise, please be reminded that this guide contains spoilers.

The Baldur's Gate 3 Karlach romance involves finding Infernal Iron so her Infernal Engine can be repaired. It's also related to her companion quest arcs: Our Fiery Friend and The Hellion's Heart. Here's a quick summary:

For the Baldur's Gate 3 Karlach romance, you need to find a Tiefling who knows a bit about engineering. Make your way to the Tiefling refugee camp in Druid Grove and look for an NPC named Dammon. He's able to help, but you need to bring Infernal Iron. There are a couple of places where you can find it in Act 1:

Return to Dammon and give the Infernal Iron. Karlach will be able to touch someone, but only for a short while. You can go ahead and test this by going for a kiss, which causes an abrupt spark.

Back in your camp, talk to Karlach and say that you know of a way to cool her off. She'll simply reply with «I'm waiting» and her dialogue will not change. To fix this, you can either throw water at her, cast a water or ice spell, or shoot an ice arrow. This will advance her dialogue in the meantime.

Your next objective, as Dammon says, is to visit him in Baldur's Gate. However, before you could even reach the city, you'd have to venture into the Shadow-Cursed Lands. There, you'll find Last