Charlotte supports the team through her healing, and minor off-field damage. Though she has ATK% scaling on her healing, her personal damage is rather poor and support based artifacts and weapons are recommended.
Charlotte's Hold Skill will change to Photo Mode if the Special Analysis Zoom Lens gadget is toggled on. Be sure to toggle it off in the inventory if you wish to properly use her Hold Skill in combat.
Regarding Weapon Choices:
Favonius Codex: Try to build some CRIT Rate if using this weapon to trigger the passive consistently.
Thrilling Tales of Dragon Slayers: Due to Charlotte's high Energy Recharge needs, this weapon may not be suitable to run in some teams.
Wine and Song: It is very important to sprint before casting Charlotte's Burst so that she gains the extra ATK% for her Burst.
Regarding Artifact Choices:
Sets
Blizzard Strayer (4): The main utility for this set is more consistent triggers. However, it also slightly helps her damage, which can be valuable at higher Constellations.
Main Stats
CRIT Rate: Only recommended if using a Favonius weapon.
Substats
Energy Recharge: Prioritize until requirements are met.
CRIT Rate: Only more useful than CRIT DMG when using .