Although there are plenty of characters that you can roll for in Wuthering Waves, one of the best that you get for free is Yangyang.

She is one of the first characters that you get on your team from the main story and brings a great amount of damage for an early-game team along with a decent secondary DPS in the later stages. She can, however, pair up with multiple different top-tier characters to build up a wombo combo that can shred some of the toughest bosses.