The 99th Number reveals its identity, and itísÖ light and music?

No.76 諧調光師グラディエール Numbers 76: Kaikyou Koushi Gladiyell (Number 76: Gladiyell the Melody Lumaestra)
Rank 7 LIGHT Fairy Xyz Effect Monster
ATK 2700
DEF 2100
Materials: 2 Level 7 monsters
You can only use the (3) effect of this cardís name once per turn.
(1) This cardís Attribute is also treated as the same Attributes of its materials.
(2) Cannot be destroyed by battle with a monster with the same Attribute as this card, also cannot be destroyed by the effects of monsters with the same Attribute as this card.
(3) (Quick Effect): You can target 1 monster in your opponentís GY; detach 1 Xyz Material from this card, and if you do, attach that monster to this card as a material.

Note, as with many Numbers, this cardís name is a pun/pormanteau. Here is refers to a Lecturer or Expert and the Japanese term for the photon particle (but not the Theme name). Since she is musical, weíve gone with an inference of being a Maestro. (And it goes well with Lumenize)

Archsorcerer: Maybe a nod to that Nana manga.

76 = nana ju roku

Nana, you rock!