Arlan is a character in Honkai: Star Rail whose power is lightning. His single-target power makes him useful on teams, but some compositions are better.
Arlan is on the Destruction Path in Honkai: Star Rail, which means he specializes in dealing damage to a single target. He does lightning damage, and his Skill costs HP instead of Skill Points. This makes him a great way to keep your party’s Skill Points in check.
When using Arlan, the most important thing to know is that he needs party members who can draw attention away from him and protect him if he’s low on HP after an attack. Since you’re giving up Arlan’s HP to do more damage, and you want him to have low HP so he can do even more damage, it’s best for him to stay near death.