Where does the "Ghost?" gift appear in the garden?

[benjymlewis]

I got the gift from Night Manor, a "Ghost?" with a question mark. The icon in the gifts menu looks like half of an Uboa face. But I don't actually see it appear anywhere in the garden... In what circumstances can we see the ghost in the garden?

[⑨ ChocolateMystia]

When the pig goes outside and stretches, you can see it poke from one of the windows.