As the captain of the Black Cat Pirates, "Kuro of a Hundred Plans" was reputed as an expert strategist who made elaborate plots to escape capture by the Marines and bounty hunters. However, he eventually grew tired of being on the run and so, three years before the start of the series, he hatched a plan to leave his crew and make the world believe he had died.
Kuro came to Syrup Village having donned a destitute appearance, and was taken in by the wealthy father of Kaya. Kuro gave the fabricated backstory that his previous employment on a ship was terminated due to a slight mistake on his behalf, and that he was left to wander around without money until he came to the wealthy family who took him in, for whom he (falsely) claimed felt deeply grateful for.
Kuro taken on the name "Klahadore", hiding his true identity as he became a butler for Kaya and her parents. He out on a calm and caring facde, in reality he loathed her. Only wanting her inheritance.
He even loathed Merry, another butler in the mansion. Everyone trusted him, he found it amusing and pathetic. But as much as he enjoyed their idiocy, he was incredibly annoyed with every second he had to spend with Kaya.
So one night when she and her parents finally fell asleep he went to the kitchen to get something to eat, grumbling softly to himself and he dropped his facade.
"Just need patience...then I'll succeed."