Reinforce Zwei
Reinforce Zwei
Reinforce II in StrikerS
Device profile
Other namesReinforce II / Rein
MasterHayate Yagami
CreatorHayate Yagami
(and Reinforce[2])
Magic systemAncient Belka
HandlingAuxiliary control
Humanoid Device profile

4 (A's epilogue)
8 (StrikerS)
12 (ViVid)

14 (Force)
Date of birth0067
FamilyYagami family
AffiliationRiot Force 6 (StrikerS)
Marine Defense Force (Force)
Special Duty Section 6 (Force)
RankAir Sergeant (pre-StrikerS)
Air Sergeant Leader (StrikerS)
OccupationSpecial Investigator Assistant (pre-StrikerS)
RF6 Commander Assistant (StrikerS)
MDF Commander Assistant (Force)
Magic colorWhite[1]
Mage rankA+ (Synthetic)
DeviceBook of the Azure Sky
Japanese nameリインフォース(ツヴァイ)
(Riinfōsu Tsuvai)
First app.A's (ep.13)
Voiced bySanae Kobayashi (A's epil.)[3]
Yukana (StrikerS et seq.)

Reinforce Zwei (リインフォース(ツヴァイ) Ri'infōsu Tsuvai, also spelled Reinforce II) is a Unison Device created by Hayate Yagami to succeed Reinforce (Eins), whose memories and personality she now carries.

Although Reinforce Zwei is significantly smaller than her namesake and all other members of the cast, barring Agito, she is capable of becoming the size of a normal youngster, although since this form uses a lot of power it is not practical for use in combat.


Reinforce Zwei has succeeded from Reinforce Eins the name "Reinforce", which is seen by Eins as a gift from Hayate that she does not want to waste after her self-destruction. Zwei and Eins are German for "two" and "one", respectively.

She is commonly referred to as Rein (リイン Ri'in).

Zwei's name and, indeed, entire concept are most likely a reference to the space carrier Reinforce Junior from Mobile Suit Victory Gundam, which was built from the remains of the space cruiser Reinforce and another ship, much like Rein was born from the Linker Cores of the original Reinforce and Hayate Yagami.


Rein is classified as a Unison Device but has also been referred to a "control device" (管制デバイス kansei debaisu), meaning that she helps Hayate organize and control her magic abilities.

In the anime, she is shown capable of unison with other Wolkenritter members (Vita and Signum) to boost them in battle, although because of their incompatibility, their Unisons are not as good as Hayate's, to whom Rein seems particularly well-attuned, as their reaction time delay clocks at just 2 milliseconds.[4]

When unisoned with one of her Lords, their clothes and hair lighten in color: Signum's hair and Knight Clothing become more bluish; Vita's Clothing becomes completely white; and Hayate's hair turns blonde but her clothing does not change. In all cases, the host's eyes change to resemble Rein's, with turquoise irises and pupils.


A's epilogue, StrikerS manga (ch.1-7) and StrikerS Sound Stage M expand on what happens before StrikerS.

In the early spring of 0067, Hayate creates Reinforce Zwei by splitting part of her Linker Core.[5][6] In the autumn of 0069, Rein has passed the Administrative Bureau's employment examination, so that Hayate decides to pass Rein the Book of the Azure Sky, the Storage Device co-used by them so far.[5]

Rein makes her first appearance briefly in A's epilogue, like a hologram summoned from Schwertkreuz. She appears solid in all subsequent productions.

The first part of StrikerS manga (ch.1-3) occurs in April 0071, nominally four years before StrikerS anime series. In it, Rein accompanies Hayate in her Relic-related missions and helps to capture a Gadget Drone with Frierenfesseln.

In StrikerSEdit

Rein is now an Air Sergeant Leader, and serves as Hayate's SNCO/Chief of Staff in Riot Force 6 HQ, the Long Arch. She is also one of the most popular examiners in the Bureau, as stated by Nanoha Takamachi in StrikerS (ep.1).

In ViVidEdit

Rein only makes minor appearances in ViVid, along the rest of the Yagami family at home or at the Intermiddle Championship stadiums. When the Yagamis creates Asteion for Einhard Stratos, she is responsible for its unit base.

In ForceEdit

Hayate and Rein in Force

Human-sized Rein in her Sailing Force uniform

In Force, Rein generally assumes the size of a normal human, though she is still shorter and younger-looking than the original Reinforce.

As revealed in chapter 2, Rein is now the Vice-Commander of TSAB Marine Defense Force on Mid-Childa, still working as Hayate's (who is the Marine Defense Force Commander) aide and second-in-command. She makes a brief appearance, telling Hayate that it is time for the "press conference", presumably related to the crisis at hand. She makes another brief appearance in the end of chapter 6, telling other members of Special Duty Section 6 ("SDS6") that she has just informed Subaru that Thoma Avenir is among the culprits they are after. In chapter 7, she receives news that Signum has engaged Cypha of Hückebein and tells Vita that Teana and Fate are already on the way to reinforce her. She then assigns Vita and Nanoha to help, as well.

In the second part of Force, Rein and Lily-Strosek become "master and apprentice" due to the similarity of a Unison Device and a Strosek-series Reactor. When Signum returns from hospital to the base of SDS6, they also encounter each other in a mock battle, both individually and in Unison/React-Engage.

Alternate continuitiesEdit


Reinforce Zwei appears in The MOVIE 2nd A's and Reflection. Comparing with the primary continuity, she is created (nominally) one year earlier in 0066 instead.

Brave DuelEdit

Reinforce Zwei Yagami (八神リインフォース・ツヴァイ Yagami Ri'infōsu Tsuvai) is the younger sister of Eins, as well as one of Yagami family's youngest children combination (alongside Agito).


Besides the abovementioned functionality as an Unison Device, when not in Unison with Hayate or the Wolkenritter, Rein herself also plays the role as a supportive mage. On her own, she holds the Zauber Rank of A+ (Synthetic)[7] and her magic color is white, just like her master's. She uses a blue tome called the Book of the Azure Sky as Device and specializes in ice-based spells.

Knight ClothingEdit

Although Rein holds a Zauber Rank for mages instead of a Ritter Rank for knights, she casts Knight Clothing instead of mage-use Barrier Jacket as her basic field defense. The design of her Knight Clothing is based off the inner clothing of Hayate's Knight Armor, while its spec is adjusted for nimble movements at the expense of defensive power, due to her supportive role.[8]


Floater FieldMidchilda
Ancient Belka
Modern Belka
Force fieldCircle
FrierenfesselnAncient BelkaCaptureCage
Frigid DaggerAncient BelkaAttackShooting
Physical HealMidchildaSupportIncrease
Ring BindMidchildaCaptureBind
WeichstützeAncient BelkaSupportOther support

Like Hayate, Rein casts certain spells of the Midchildan system, although she does not officially use this system.



  1. ^ In a Force artwork, Reinforce Zwei's magic color during a set-up is (mistakenly) depicted as light blue.
  2. ^ Magical Girl Lyrical Nanoha StrikerS Sound Stage 3, Track 8. Hayate: "My Linker Core is melded with the original Reinforce, and Rein's Linker Core is born from my own Core..."
  3. ^ Magical Girl Lyrical Nanoha A's, DVD Vol. 6 Booklet (2006). However, in the BRD Booklet (2014), it is misstated as Yukana, the character's cast in subsequent productions (from 2007 onwards).
  4. ^ Magical Record Lyrical Nanoha Force, chapter 20, page 7.
  5. ^ a b Magical Girl Lyrical Nanoha StrikerS Starter Book.
  6. ^ Magical Girl Lyrical Nanoha StrikerS, episode 4: Hayate mentions that 8 years ago (so 0067) was when she first met Carim Gracia, and back then Reinforce II had just been born.
  7. ^ Magical Girl Lyrical Nanoha StrikerS, DVD TSAB ID Card.
  8. ^ Magical Girl Lyrical Nanoha StrikerS, DVD Vol.2 Booklet (ep.5).

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