Oliveira is an “S” rarity hero from the “Blood Rose” faction, and she’s an attack-type brawler.
You can unlock her by either buying the “Warrior Battle Pass” or grabbing special offers.
Rarity: 
Type: Attack 
Faction: Blood Rose 
Attack: 16,628
Defence: 13,491
Troop Size: 506
Skills
Blade Storm
“ She places a rotating blade at a chosen spot, dealing damage to enemies within range. (Damage: 1200 to 1241, and it lasts for 4 seconds.) “
Type: Active Skill
Upgrade Preview:
Star Level 1: Increases damage factor by an additional 150.
Star Level 2: Increases duration by 1 second.
Star Level 3: Increases damage factor by an additional 150.
Star Level 4: Inflicts additional bleeding effect.
Star Level 5: Increases damage factor by an additional 300.
Fatal Blow
“ Normal attacks’ damage factor increases from 900 to 920.”
Type: Normal Attack
Upgrade Preview:
Star Level 1: Increases damage factor by an additional 90.
Star Level 2: Increases damage factor by an additional 90.
Star Level 3: Increases damage factor by an additional 90.
Star Level 4: Increases damage factor by an additional 120.
Star Level 5: Increases damage factor by an additional 210.
Gifted Girl
” Increases the training speed of the Assaulter Camp by 40% (upgraded to 41%). “
Type: Global Effect
Upgrade Preview:
Star Level 1: Training speed +20%.
Star Level 2: Assaulter DEF +10%.
Star Level 3: Assaulter training resource consumption -5%.
Star Level 4: Assaulter ATK +10%.
Star Level 5: Attack and Defence boost stats apply to all unit types.
Potential Unleashed
“For every 1 Blood Rose heroes deployed, the troop’s ATK & DEF increases by 5%. When deploying 5 Blood Rose heroes, the troop capacity increases by an additional 10%.“
Type: Exclusive Talent