Well, that cleared something up that I'd almost forgotten about.
I almost respect the way she externalises her madness. Almost. But she treats suicide too trivially for someone who has no intention of actually going through with it.
Still, Punpun's father was a complete bellend either way. What kind of idiot hits his wife with the microwave oven, regardless of how melodramatic she is being? I'd kinda hoped we'd never hear from that arsehole again.