Viviane

This lady of the lake recently hit the top of the tier list of some Content Creators after her hero card was unveiled by Simon a couple videos ago. Until EA starts assume if this moistened bint had lobbed a scimitar at you... that you should keep her. :)

BASIC Invigorating Mist
Attack 1 enemy (345%ATK) and reduce the Divinity Cost of each ally by 15 (stacking up to 10 times).
Awakening III: Stacks up to 20 times.

CORE Cooldown 6 Aqueous Benediction
Place [ATK Up II] and [DEF Up II] on all allies for 2 turns then increase the duration of all {buff} on all allies by 1 turn.
Awakening I: Also place [Sharpen II] for 2 turns.

ULTIMATE 575 3725 Melody of Avalon
Remove all {Disable} from all allies. Also, remove all {Debuff} on allies from Avalon then attack 1 enemy (495%ATK) with all allies joining the attack. If the target is defeated, increase the Turn Meter of all allies by 20%.

PASSIVE Blessing of the Lake
Allies inflict 20% increased damage with their Basic Abilities. This is doubled when joining attacks.
Awakening V: Allies have a 100% chance to inflict bonus true damage for 100% of their ATK which cannot critically hit when they attack.

IMPRINT Blessing of the Lake
This hero inflicts 10% increased damage with their Basic Abilities. This is doubled when joining attacks.
Source: Fateless Videos