Sesshomaru is the older half-brother of Inuyasha. He is a full fledged Inu Yokai (Dog Demon, literal translation), and is usually stoic and hard to read.In the beginning of the series, he is a ruthless enemy of Inuyasha, wanting to take the Tetsusaiga from him, but Sesshomaru soon becomes compassionate towards Jaken, his servant, and Rin, an orphaned human who showed him kindness while he was injured.
This is a really beautiful cosplay of my favorite yokai of the series! He looks so peaceful, sleeping by the tree. No wonder Rin took a liking to him the moment she saw him.