Yellow Temperance
Appearance/Personality
Yellow Temperance appears as a blob of yellow goo, with no mouth or any other facial features, bound to it's user, Rubber Soul. As with most stands, Yellow Temperance has no personality, but it is even more so, for it has no body at all. Unlike most stands, Yellow Temperance can be seen, as it is bound directly to its user's body.
Powers
Appearance Replication: Yellow Temperance is able to alter Rubber Soul's physical appearance into anything Rubber Soul wants, no matter what. This ability seems to be almost instantaneous, as it manages to kill a woman in a ski lift and steal her body in an instant, while the other riders are focused on Jotaro, who had been thrown into the car earlier. It also managed to make a perfect copy of Kakyoin, even though he didn't actually kill him, and perfectly imitate even his habits.
Invincibility: Because the Temperance card represents endurance, Yellow Temperance is, for all intents, invincible. It survived a barrage of punches from Star Platinum without any damage, real or even cosmetic, and survived a fall from a sky lift without trouble.
Assimilation: Yellow Temperance has the ability to assimilate other flesh, using it to grow stronger and larger. It starts as just a small part on a person and then begins to cover their entire body, spreading to whereever it has touched until it completely assimilates the person.
Stand Mimicry: Yellow Temperance has shown the power to imitate other stands. It was only seen once; while disguising it's user as Kakyoin, the user was able to use what appeared to be Kakyoins stand to catch a theif. It is unknown to what extent Yellow Temperance can mimic other stands, but it seems to be small as he never used this skill in battle.