|Other names||Black Iron Count|
|Magic system||Ancient Belka|
|Japanese name||グラーフアイゼン |
|First app.||A's manga (prologue)|
|Voiced by||Tetsuya Kakihara|
It appears to have no programmed gender and speaks German (Belkan) language, such as when it reloads cartridges ("Nachladen") or uses one up ("Explosion"), as well as approaching targets ("Gegenstand kommt nah").
"Graf Eisen" means "Count Iron" (or "Earl Iron") in German. Notably, its initials are rendered "Ge" instead of "GE" in INNOCENT game and The MOVIE 2nd A's supplementary materials.
Vita usually calls it simply Eisen.
It generally appears as hammer-shaped, sometimes featuring a drilling spike in its more powerful forms.
In StrikerS, a new Limit Break form is added.
| Standby Form|
|Appears as a miniature hammer, hanging on Vita's neck-chain.||A's (ep.3) — present|
Ger. "Hammer Form")
|Graf Eisen's default form, appearing as a two-sided hammer that distantly resembles a polo mallet. It can launch up to 4 circular bomblets (Schwalbe Fliegen) and create a massive sonic shockwave (Eisengeheul) as a distraction.||A's (ep.1) — present|
Ger. "Missile Form")
|The more powerful rocket-propelled assault mode.||A's (ep.1) — present|
Ger. "Giant Form")
|Faces of the hammer become octagonal. It can grow to many times its (or for that matter, Vita's) size, or remain compact in size which allows cartridge loading. It is the Full Drive form in StrikerS.||A's (ep.8) — present|
Ger. "Destruction Form")
|Graf Eisen's Limit Break form in StrikerS, combining Gigantform's size changing capabilities with Raketenform's rocket propulsion. As opposed to a metal spiked tip like the Raketenform, this form features a spinning drill as the tip.||StrikerS (ep.25) — present|
The Zerstörungsform may be a reference to Tengen Toppa Gurren Lagann, which aired concurrently with StrikerS and starred Tetsuya Kakihara as Simon.
| Cartridge System|
|Three-cylinder type Cartridge System.||A's (ep.1) — present|
- ^ MGLN A's, DVD Device Card.