
According to Mytour, Charlotte brings nothing particularly groundbreaking to the table. These skills are quite ordinary, offering a bit of Ice damage and primarily focusing on healing through her ultimate ability. Here's the breakdown:
Normal Attack: Cool-Color CaptureBasic Strike: Targeting with Monsieur Verite, inflicting Ice damage with three consecutive strikes.
Gathering Power: Consuming energy, Charlotte releases Monsieur Verite after a short duration to deal AOE Ice damage.
Counter Attack: Diving down to strike the target along her path, causing AOE Ice damage upon landing.
Pneuma: Periodically, when using her gathering power move, Charlotte summons a Spiritbreath Thorn that pierces enemies, dealing Ice damage and applying the Pneuma effect.

Press: Inflict AOE Ice damage to enemies in front while applying the Snappy Silhouette effect to up to 5 enemies. During this time, enemies continuously suffer Ice damage.
Hold: Charlotte enters Composition Mode (up to 15s), allowing her to move freely. The camera zooms in continuously when pressing E to find the perfect Finisher Frame.
- When this state ends, Monsieur Verite deals Ice damage to all enemies within the frame and applies the Snappy Silhouette effect to them.
- If reaching the Finisher Frame, you generate Focused Impression, lasting longer and dealing greater damage, but also extending the cooldown.

Charlotte creates a Verified Scene, dealing AOE Ice damage and healing HP for the team based on her attack.
Confirmed Scene:
- While the ultimate is active, Monsieur Verite deals Ice damage to enemies within its range.
- Continuously heals characters on the field based on Charlotte's attack.

When enemies marked by Focused Impression are defeated, the cooldown of the elemental ability is reduced by 2s. Can be triggered 4 times within 12s.
Combat Talent 2: Diversity Survey:For each Fontaine member in the team (excluding Charlotte herself), Charlotte gains a 5% increase in healing. Each non-Fontaine character grants Charlotte a 5% increase in Ice damage.
Exploration Talent: First Person Shutter:After equipping the Special Analysis Zoom Lens, holding the elemental ability button allows you to take photos in a unique way.

Charlotte's Destiny
CT1: After using the ultimate to heal a character, it will mark them with Verification. This effect heals them once every 2s for 6s, based on 80% of Charlotte's attack.
CT2: When using the elemental ability, hitting 1/2/3 enemies increases Charlotte's attack by 10/20/30% for 12s.
CT3: Increases the ultimate's level by 3.

CT4: When the ultimate hits an enemy with Speedy Silhouette or Focused Impression effect, it deals an additional 10% damage and restores 2 energy to Charlotte. This effect can be triggered 5 times every 20s.
CT5: Increases the elemental ability level by 3.
CT6: When the character's normal or charged attack hits an enemy marked by Focused Impression, Monsieur Verite follows up with an AOE attack dealing 180% of Charlotte's attack as damage and healing nearby characters by 42% of Charlotte's attack. This effect can be triggered once every 6s and counts as damage/healing from the ultimate.

Conclusion
Thus, Charlotte's skill set makes her a team healer through her ultimate. She can relatively effectively substitute for Baizhu in teams with Hydro characters, thanks to her continuous healing abilities through multiple sources (ultimate, CT1, CT6). However, Baizhu remains the most suitable for Hydro teams due to his powerful healing through elemental skill without needing energy recharge. You can consider Charlotte as a 'cost-effective' solution to pair with Hydro characters like Mona.