There are several role-playing quests that tell stories about different characters or monsters, from the view-point of the respective creatures. These typically take place in a dungeon, which you enter by dropping special items on their altar. Afterwards, you're warped in, taking the form of other characters.
Talk to Deian about his "Private Story" while having a White Spider Fomor Scroll, a Red Spider Fomor Scroll, and a Black Spider Fomor Scroll in your inventory. He will give you the Giant Spider Fomor Scroll.
Drop the scroll onto the Alby dungeon altar to enter the dungeon as a Spider. After opening the boss door you will meet the Black Wizard, who transforms you into a Giant Spider. Afterwards you receive the keyword "Birth of the Giant Spider" and you're warped out of the dungeon.
Go back to Deian and talk to him about the new keyword, you'll receive a Shepherd's Gathering Knife as reward.
Talk to Trefor during a part-time job for Deian or Tracy to get Trefor's Gauntlet from him. Drop the item onto the Alby dungeon altar to enter the dungeon as Trefor, in search for travelers who might need help.
There's only one room in the dungeon, where an NPC is surrounded by 6 Goblins that you have to kill to protect the NPC. if you fail to do so, and the NPC is killed, the RP ends. Be careful with your attacks, since you're able to hit the NPC.
If you fail, you can go back to Trefor to try again. You can do this as many times as you want, but after the third fail you don't get a reward anymore. The NPC gets stronger after the first fail though, making the RP easier on repeated tries.
If you succeed, you get a Wooden Blade as reward.
Give Caitin a Golden Egg as a gift to receive the Egg from Caitin. Drop this egg onto the Alby dungeon altar to play a chick on its search for its mother.
Befriend Ranald by talking to him and giving him gifts until when you talk to him about his "Private Story", he gives you the item Ranald's Medal. Drop the item on the Rabbie dungeon altar to enter the dungeon as Ranald.
The dungeon is a normal Rabbie, with a Succubuss at the end.
Tracy and Walter
Befriend Tracy by talking to him and giving him gifts until when you talk to him about his "Private Story", he gives you the item Tracy's Hatchet.
Take the item and a friend to Ciar dungeon and drop the item onto the altar to enter the dungeon. You will play as Tracy and your friend as Walter.
Ai and Mai
Take the item and a friend to Alby dungeon and drop the item onto the altar to enter the dungeon. You will play as Ai and your friend as Mai.
Use caution, the golden rats are much stronger than regular rats and are capable of using lightning bolt. Beware of multi-aggro in the boss room between golden rats and golden ratmen.