|Magic system||Modern Belka|
|Japanese name||セイクリッド・ハート |
|First app.||ViVid (ch.1)|
It is formerly categorised as a "Hybrid Intelligent Device" in ViVid (ch.17). However, further explanation is yet to be revealed, and this might be a former name of the "autonomous-action type Intelligent Device" introduced in ViVid Strike!
Vivio additionally gives Sacred Heart a "mascot name", which she uses most of the time: Chris (クリス Kurisu).
Sacred Heart appears as a plush bunny that floats in the air to follow Vivio, with appearance similar to the plush bunny that Nanoha gave to Vivio in StrikerS. The bunny is actually an overcoat, its substance is an ordinary crystal like other devices.
No matter in Adult Mode or not, Sacred Heart may be absorbed into Vivio's body for better control, especially when entering the following alternative forms:
- Contact Mode (コンタクトモード Contakuto Mōdo): All the resources of Sacred Heart is concentrated in defense support, making Vivio's whole body a defense equipment. It is first used in a spar against Chantez Apinion, and the command phrase is "Sacred Heart Contact Mode, set up." It makes Vivio's knuckle strong enough to block the blade of Phantasma. In ViVid (ch.80), it is used during Vivio's bet with Ray Tundra to only watch his attack without wimping out.
- Axel Mode (アクセルモード Akuseru Mōdo): A form which concentrates in speed and reaction support. It is used in the Intermiddle match against Miura Rinaldi.
- ^ Magical Girl Lyrical Nanoha ViVid, chapter 17. In chapter 1, when Vivio sets up for the first time Sacred Heart for Master registration, she also refers to her magic system as "Belka the main, Mid-mixed hybrid."
- ^ Magical Record Lyrical Nanoha Force, chapter 20.
- ^ Magical Girl Lyrical Nanoha ViVid, chapter 19.
- ^ Magical Girl Lyrical Nanoha ViVid, chapter 35.