I haven't read beyond the first chapter =D I am deathly afraid of those thing, I can handle a spider being in my room but the minute I see a palmetto my ass is up for the night out of my room paranoid.
You, good sir/madam, are crazy. Maybe it's because I only see cockroaches if I decide to take a stroll around the city at 1 am (or maybe it's because I watched Arachnophobia when I was a impressionable child and that scarred for life), but 10/10 I would prefer the cockroach.
Anyway, yeah she can be kind of cute and all, but it is against my code to leave any cockroach alive if I can prevent it, so no love for this manga :/