CHARACTER SELECTION
Starting the game will give you the option to select the male, Aether, or the female character, Lumine. As of version 1.0 this selection cannot be reverted or changed later in the game. If you are worried about the abilities, rest assured! Whatever your choice is, both characters have the same abilities.
The trope of a useless Main Character doesn't appear here. Your main character is a 5 star and the only one which can freely adapt a different element once you reach a new region back and forth. So keep leveling her/him and include your main character on your adventure. Currently there are only 2 regions so Anemo and Geo are the only elements you can choose for now.
Try to maintain at least one character of every element to be prepared for counter partys on certain missions like Domains, Abyss or other specific runs.
As of this version (1.0) you don't start with a claymore user nor do you get one through the storyline. Luckily the gacha has a guaranteed Noelle in the Beginner Banner so it is highy recommended to get at least her or one of the other greatsword users for farming and fighting armored enemies.
Greatsword Users as of version 1.0 Beidou, Ninguang, Noelle, and Razor.