Sloth

(Japanese:スロウス, Surōsu) is a homunculus that was created by Edward Elric and Alphonse Elric, in a failed attempt to bring Trisha back to life.

In the anime
In the anime, Sloth was created when the Elric brothers tried to revive their mother, Trisha Elric. Sloth is able to assume a watery composition, which she can use to drown others by grabbing hold of them. Sloth constantly suffers from memories of raising the Elric brothers. Determined to prove to herself that those are Trisha's memories, not her own, she longs to be able to kill them, as a mother could never kill her own sons. She develops a mother-son relationship with Wrath, and the two stick together during the second half of the anime. During a battle with the Elric brothers Wrath, having unknowingly merged with Trisha's remains earlier, merges with Sloth's body to help her in combat. This leaves Sloth paralyzed, allowing Edward Elric an easy opportunity to convert the water in her body into ethanol, which then evaporates into the atmosphere. But there are many people saying she may be still alive.

In the manga
In the manga, Sloth is not introduced until midway through the series, where he is revealed to be a large, muscular, dim-witted man. He is tasked with digging a gigantic transmutation circle beneath Amestris to be used in turning the country into a Philosopher's Stone. Though he is briefly impeded in this job when he runs into the Elric brothers at Briggs' Fortress, he is allowed to continue his work, finishing the circle in chapter seventy-eight. Just as his name, Sloth is always wanting to rest and finish his job so he can stop working. When Greed is captured by Wrath, he asks about Sloth and Lust answers saying he is still working, meaning he was already making the tunnel before Greed left the group one hundread years before.