"I...w-what...is your offer...?"
"I can give you legs for 3 days and if you can make Princess Delilah fall in love with you..you can keep the legs..but if you don't, then I'll take the legs and you'll have your boring mermaid tail..."
"...I-can you really do that...?"
Despite seeming suspicious-he can also see the hope behind her eyes-he's got her, hook, line, and sinker
"Mhm..All you have to do is give me your voice.."
"M-my voice!?"
"Yup."
"B-but...w-without my voice I can't-"
"That's the deal. If you dont like it, you dont want your legs."
"I...will I really have legs...?"
"Yes."
