First, a bug: if Cecil is dead, then during combat he still tries to take his turn, but every option is greyed out and the game's softlocked. Got stuck in the forest.
Regarding the writing, which is so important for the YIIK-like genre: it's pretty good, got a couple of genuine chuckles. The premise is a bit silly, Cecel is too tsundere for the old Chief, allegedly hating him but still returning to the city.
Maybe Cecel isn't kooky enough for my tastes, but being a walking cliche, he probably needs some additional drive or charisma to stand out among fedora-wearing supernatural private eyes. He just sort of vaguely reacts to the wacky flavour text, makes snide comments, and goes along with the plot.