She can communicate verbally, she works and lives independently, but they share common ground.

Players can not communicate verbally, but may help each other or not as they wish.

However, despite this, she makes up for her inability to communicate verbally with animated facial expressions, giving her a cute, childlike appearance.

With their abilities unlocked, they perpetually glow with a green aura, and are able to communicate verbally.

When they are placed in the house together, they develop a deep bond, even though they do not speak each other's language and thus can not communicate verbally.