Perhaps Nazono Senen will sacrifice himself.
In an anime series, if the protagonist has a powerful and battle-hardened master, they become a pillar of support for the protagonist, however, their endings are often not as happy as sacrificing themselves so their disciples can live; this is quite common as it helps the protagonist mature>!​!<
This is reinforced by the detail that Cid, in the guise of Nazono Senen, once revealed that the cult of Diabolos annihilated his entire family
Previously, the main character in that episode only knew about Diabolos after Shadow's true identity was revealed, Lalanoa already knew that, meaning even if Cid faked his death and disappeared without becoming Shadow, Lalanoa would still hate the Diabolos cult As she gradually understands the meaning of the cult, and because the cult killed her master, she might somehow meet Shadow Garden, and when they share the same ideals, everything will be perfect Without revealing his identity, Nazono Senen could become a legend, remembered forever as a mentor who saved her, and she will avenge him
Honestly, if Cid were to reveal himself as Shadow, everything would be incredibly pointless and cheap given all the events that have already unfolded and the matter of throwing away old wounds This caused him to frequently draw blood from its mouth like a cancer clock counting down the hours to death, and for example, in an anime series, there's a character who is the main character's master and keeps drawing blood from its mouth from time to time Then we can sense that the author will bring that master to an early end; it's definitely bad, it's just a matter of whether it's a little or a lot bad