[Inktober]Nabi traveled to the Halloween gathering

We don't celebrate Halloween, so I share no mood or have no idea how Western people feel about the day. In South Korea, we have Catholic church but perhaps missionaries intentionally didn't introduce the related pagan festival to us.
But for imagination purpose for the drawing, I put Nabi traveling to a forest with other city cats to the Halloween cat gathering for the first time. The face of the two cats looked surprised so I added a spider later. Now I don't know whether they are surprised or asking the way to the gathering.

Platinum carbon ink (waterproof)
Pentel usuzumi (diluted sumi ink) brush pen FL3L
Noodler's Lexington gray ink (waterproof)
Kuretake aquabrush - small
Platinum carbon desk fountain pen 
Kuretake desk brushpen no. 8
Brause Bandzug calligraphy nibs - 1mm (for drawing grass) and 2mm (for calligraphy)