Captain Ninto is the solution to the hard anagram clue: AN PAINT TONIC. He will ask you to solve a puzzle box. Interestingly, when speaking to him for the challenge, he is very much sober. After he has given you your reward, however, he is once more drunk.
Gnome Restaurant tips
Please note that the amounts of the rewards are incomplete and are being updated with the variable range of the items given.
Item Quantity Rarity GE market price Uncut opal 2–3 (noted) Common 368–552 Uncut jade 2–7 (noted) Common 536–1,876 Uncut red topaz 1 Common 2,960 Uncut sapphire 7–10 (noted) Uncommon 4,648–6,640 Uncut emerald 3–7 (noted) Uncommon 2,418–5,642 Uncut ruby 2–5 (noted) Uncommon 2,898–7,245 Uncut diamond 1 Uncommon 3,019