(A/N: Requested by MrTubbie06, and it's actually Yandere Protective And Caring Z23 ,Javelin, Laffey, Ayanami And Purifier X Male Gamera Shifter Reader.)
(Y/N is the current commander of Azur Lane, but nobody knows he's also the current reincarnation of a monster guardian named Gamera.)
(One day, Z23, Javelin, Laffey and Ayanami start scouting out for possible siren activity due to a bunch of ships going missing.)
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Z23: I wonder how did the sirens make too many of us go missing in a so little time...
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Javelin: Maybe they've had enough playing around and started taking us seriously.
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Laffey: Hmm, I don't know... what if they're not behind this?
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Ayanami: They're not. (points at someone) Look.
(They turn to see Purifier injured and fleeing.)
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Purifier: (weakly) Please... help me...
(They are hesitant at first since they don't actually trust the sirens, but then they see the real cause of so many shipgirls' disappearance, and what Purifier was running away from. It's a swarm of Gyaos.)
Gyaos: (screech)
(Having no other choice, the four shipgirls decide to help Purifier and together, they try to fend off the Gyaos Swarm, but they are overpowered and about to be killed, but suddenly a roar is heard, and then Y/N comes in as Gamera.)
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Gamera: (roars)
(Gamera fends the Gyaos Swarm off, saving the shipgirls.)
Z23: Who is this?
Javelin: He looks so big...
(As Y/N manages to fend off the Gyaos Swarm, he falls unconscious and reveals to be Y/N.)
Shipgirls: Commander.
Purifier: Oh no, dealing with that swarm must have got him tired.
(Suddenly Super Gyaos comes in, causing Y/N to get up and transform into Gamera again, but Super Gyaos has the advantage over him due to his weakened status. This triggers the girls.)
Shipgirls/Purifier: NO ONE HURTS OUR Y/N!
(The five girls attack Super Gyaos, and it gives Y/N enough time to shoot a fireball in Super Gyaos' face, killing him. The girls then approach him.)
Shipgirls: Don't do it again, commander.
Purifier: Yeah, you made us worried.
Shipgirls/Purifier: We love you, commander.
(Y/N has eventually married the five girls, and during the weeding ceremony, both Azur Lane and the Sirens decide to put their differences aside and work together with Y/N against future threats to the universe.)
