Assassination of Lealia Shearley and Reiner Shearley

"The assassinations of Lealia and Reiner Shearleys have given all of Caescicaea a lot of nightmares, especially their daughter Serhilda Shearley. Now this is much worse than when Zangekk's father was killed by the same faction that disguised as Cuphead characters. The Belkan Grey Men perhaps. Coincidence?"

--Su Ji-Hoon, The Tragic of Serhilda Shearley

The Assassination of Lealia Shearley and Reiner Shearley is the assassination event about queen Lealia Shearley and king Reiner Shearley (which are Princess Serhilda's parents) have been poisoned and assassinated after they ate their foods which being poisoned by five Belkan Grey Men members who disguised as Baroness Von Bon Bon, Cala Maria, Hilda Berg, Rumor Honeybottoms and Sally Stageplay.

Only happened in during the USRAC War when the Belkan Grey Men sent 5 members who disguised as those from the above that they poisoned foods of Serhilda's parents for assassinate them and make Cuphead and all of his friends being framed like Plankton framed Mr. Krabs in Plan Z that it could be caused Caescicaea being big fluctuations : Lost Serhilda's parents, their former feudalism have been destroyed, causing economic constraints and made Serhilda's sorrow.

After this happen, Serhilda Shearley would became the Queen of the Federal Republic of Caescicaea with the help of New Central Powers and Caescicaea's capitalism in her coronation, which Caescicaea joined membership of New Central Powers. However, she would defeat and capture all members of the Inkwell Isle Girls instead of kill them for her revenge on her parents's death before The Journey Home song