21O

21O
Rarity	3-star - 5-star
Role
Acquisition	Rare Summon
Time Limited	Yes
CG LB
Series	NieR:Automata
Gender	Female‎
Race	Machina
No.	782, 783, 784
TMR	Mechanical HeartMechanical Heart Mechanical Heart Increase HP/SPR (15%) Chance to counter physical attacks (30%) with Mechanical HeartMechanical Heart Heal (800 HP, 1x) to caster Chance to counter magic attacks (30%) with Mechanical HeartMechanical Heart Heal (800 HP, 1x) to caster

A unit of the YoRHa soldiers, a group from a faraway world made up of androids. A communications operator stationed in the bunker, she is in charge of relaying instructions to YoRHa soldiers on the ground and providing data analysis. Though individual personalities can vary, she is very calm and serious. She dislikes any conversation which does not pertain to missions. As 9S's operator, she provides him with mission support.

Statistics

Stats

Rarity	HP	MP	ATK	DEF	MAG	SPR	Attack Hits	Drop Check	Exp. Growth Pattern
3-star	1381	82	66	63	49	53	2	3	4
4-star	1796	107	86	83	64	70	2	4	4
5-star	2336	140	112	108	84	92	2	5	4

Maximum Stats Increase

Rarity	HP	MP	ATK	DEF	MAG	SPR
3-star	150	35	10	10	10	10
4-star	210	45	14	14	14	14
5-star	240	60	16	16	16	16

Resistance

Element Resistance
-	-	-	-	-	-	-	-
Status Ailment Resistance
-	-	-	-	-	-	-	-

Equipment

Weapons
Armors
Rarity	Ability Slots	Affinity
3-star	2	-
4-star	3	-
5-star	4	-

Innate Abilities

Special

Active
Min rarity	Level	Icon	Name	Effect	Hits	MP
3-star	10		R010: Lazer	Physical damage (2x) to one enemy	1Attack frame: 60	16
3-star	40		Material Transfer	Randomly use: (50%) Material Transfer  -  Heal (400 HP, 3x) to all allies (30%) Material Transfer  -  Heal (1000 HP, 3.4x) to all allies (20%) Material Transfer  -  Heal (2500 HP, 18x) to all allies	-	18
4-star	28		Data Analysis	View info on one enemy Decrease resistance to all elements (30%) for 3 turns to one enemy	-	35
4-star	60		Support All: 21O	Increase ATK/DEF (40%) for 3 turns to all allies	-	53
5-star	68		Support One: DEF/SPR	Increase DEF/SPR (80%) for 2 turns to one ally	-	24
5-star	75		Support One: ATK/MAG	Increase ATK/MAG (80%) for 2 turns to one ally	-	24
5-star	80		A100: Decoy	Physical damage (1.5x) with delay (1 turn) to all enemies Negate 1 physical attack for 3 turns to caster	4Frame delay: 2-10-10-10 Attack frames: 2-12-22-32	24
Passive Sort
Min rarity	Level	Icon	Name	Effect
3-star	18		MP +10%	Increase MP (10%)
4-star	47		Physical Damage Cut +2	Increase DEF (20%)
5-star	34		Ranged Damage Cut +2	Increase SPR (20%)
5-star	54		Max HP Boost	Increase HP (10%)

Limit Burst

Rarity	Name	Effect		Hits	Cost
3-star	Reckless	Base	Physical damage (3x) to one enemy Inflict 1 random status ailment (10%) to one enemy	11	12
		Max	Physical damage (3.9x) to one enemy Inflict 1 random status ailment (28%) to one enemy
4-star	Reckless	Base	Physical damage (3.5x) to one enemy Inflict 2 random status ailments (20%) to one enemy	22	14
		Max	Physical damage (4.9x) to one enemy Inflict 2 random status ailments (48%) to one enemy
5-star	Reckless	Base	Physical damage (4x) to one enemy Inflict 3 random status ailments (30%) to one enemy	36	16
		Max	Physical damage (5.9x) to one enemy Inflict 3 random status ailments (68%) to one enemy

Awakening Materials

4★	5★
Allure Powder (25) Esper Cryst (15) Rainbow Needle (10) Heaven's Ash (5) Sacred Crystal (5)	Rainbow Needle (20) Wicked Drop (10) Sacred Crystal (10) Brilliant Ray (5) Holy Crystal (5)

Sprites

3-star	4-star	5-star

Quotes

• Background Story
• Fusion
• Awakening
• Summon
• Trust Mastery

Background Story

3★	A unit of the YoRHa soldiers, a group from a faraway world made up of androids. A communications operator stationed in the bunker, she is in charge of relaying instructions to YoRHa soldiers on the ground and providing data analysis. Though individual personalities can vary, she is very calm and serious. She dislikes any conversation which does not pertain to missions. As 9S's operator, she provides him with mission support.
4★	A unit of the YoRHa soldiers, a group from a faraway world made up of androids. A communications operator stationed in the bunker, she is in charge of relaying instructions to YoRHa soldiers on the ground and providing data analysis. She is very serious, often having to keep 9S from engaging in personal conversation. However, she does seem to sometimes enjoy acting like an older sister to the childish 9S.
5★	A unit of the YoRHa soldiers, a group from a faraway world made up of androids. A communications operator stationed in the bunker, she is in charge of relaying instructions to YoRHa soldiers on the ground and providing data analysis. She holds a great interest in data analysis, often requesting 9S to gather various human data. She is particularly interested in the human concept of "family."

Fusion

3★	Glory to humanity.
4★	21O. Nothing to report.
5★	Enhancement successful. All for humanity.

Awakening

4★	Thank you for giving me power.
5★	I did not think we could grow stronger with methods we were unaware of. You must also tell 9S of this.

Summon

3★	I am 21O, operator for 9S.
4★	Personal conversation is forbidden during missions. If you've something to talk about, leave it for later.
5★	Have you seen 9S? I'm a little worried that he might have done something to jeopardize humanity.

Trust Mastery

If you understand what family is, would you mind telling me?

Notes

Gameplay

• Obtainable through Rare Summons during the NieR:Automata Collaboration Event, Destroy the Machine Lifeform.
• Takes added physical damage from Machine Killer resources.

Trivia

• Her full name stands for YoRHa No. 21 Type O (Operator)