Yes. Trader Bob and Naomi are both from Flight of the Amazon Queen.
And yeah there’s a few TY cameos and references in Blade Kitten including the unlockable mascot costume version of TY. Did you catch him in the background of the second level?
The Frills were actually based off a character I designed for my animation course at art college.
The Zombie Frills are a nod to the Halloween Harry/Alien Carnage/Zombie Wars games.
There is also a 100% complete bonus character called Kitty in Windows 8 TY. You can guess what game she’s from.