Tuk can be found scavenging in a hidden room in the Royal Waterways, behind a breakable wall in the upper-right corner of the uppermost section. She sells the Knight Rancid Eggs for 80-100. She will not sell eggs if the Knight has 80 or more in their inventory. She also gives them one for free if they are wearing the Defender's Crest, stating the smell reminds her of the Dung Defender, to whom she is grateful for helping her.
In Steel Soul Mode, Rancid Eggs are no longer required to pay Confessor Jiji and thus no longer useful to buy. Instead, Tuk is found dead, her corpse infected and cannot be bartered with for eggs. She cannot be interacted with, and only one Rancid Egg is found on her body.
Tuk is a scavenger who keeps to herself. She vehemently searches the Royal Waterways for someone, hoping they will offer their apologies to her. She sustains herself on Rancid Eggs, and believes the water down there will always provide her what she is looking for. Despite her introverted nature, she remembers those who help her, such as the Dung Defender.
Mmmnnnnnnngghhh... Don't take something that isn't yours. That's the law. Everything you see... it belongs to me. Don't be angry. I'll share my food with you... if you give me Geo.
Mmmnnnnnnngghhh... The water brings me everything I wish for... I just need to find it. It brought you here, too. Are you hungry? I'll share my food with you... if you give me Geo.
I'll share my food with you... if you give me Geo.