Magical Girl Lyrical Nanoha Wiki
Magical Girl Lyrical Nanoha Wiki
Device profile
Other namesXK-04h[1]
MasterCaro Ru Lushe
CreatorShario Finieno
Magic systemMidchilda
Japanese nameケリュケイオン
First app.StrikerS (ep.3)
Voiced byKaoru Edo
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Kerykeion (ケリュケイオン Keryukeion) is Caro Ru Lushe's Boost Device, specializing in mana augmentation. Scrapping the complex magic support functions found in regular Devices, Kerykeion boosts Caro's own mana, and specializes in releasing it in the most suitable form for the task at hand. Her programming language is English.


Kerykeion means "herald's staff" in Greek, which is known in English as Hermes' Caduceus staff.

In StrikerS opening theme one, Kerykeion is coded XK-04h.


Kerykeion makes her first and main appearance as Caro's equipment in StrikerS and StrikerS manga. She also appears briefly in Sound Stage X, ViVid and Force.


DeviceGrid Kerykeion.png
Forms Description
Standby Mode
(待機モード Taiki Mōdo)
Accessory with two small pink gems and wing-shaped ornaments, wearing on Caro's left wrist.
Active Mode
(通常モード Tsūjō Mōdo,
lit. Usual Mode)
Appears as a pair of fingerless gloves on Caro's hands. The pink gems glow and stripes elongate when Kerykeion is processing.
Second Mode
Sekando Mōdo)
The right glove grows a pair of light fins that allow mana acceleration and firing of shooting spells like Wing Shooter.

First seen in StrikerS (ep.21).

Third Mode
(サードモード Sādo Mōdo)
Each of the gloves grows a pair of light fins. Boosted Protection can be used.

First seen in StrikerS (ep.24).


Caro about to buff Erio and Strada

Kerykeion was tuned with two main points in mind: to reduce the amount of mana needed during Summoning, and to strengthen Boost magic. She plays a good role of a sensor to detect enemies and summonings. As for AI, Kerykeion is relatively amenable. In the words of the device meister Shario Finieno, the Lightning Squad devices are "pretty similar in personality to their users".

As Kerykeion is in the form of two gloves, with two support engines it can cast two different boost spells simultaneously (one Boost Up, one Enchant), known as Twin Boost (ツインブースト Tsuin Būsuto). It is first seen in StrikerS (ep.5), cast on Erio Mondial and Strada to increase their striking strength and cutting capacity respectively. This is then known as Twin Boost "Slash & Strike", being a combination of Boost Up "Strike Power" and Enchant "Field Invade".



  1. ^ Magical Girl Lyrical Nanoha StrikerS, opening theme 1.