A.N. Well Hello. *smiles sheepishly* I um well, yeah. So I know I have put THL and HoaM on Hiatus and I did promise some things with them, but I recently got into Inuyasha and as I love HP crossovers and putting Harry is strange situations this was born. No I have not seen all seasons of Inuyasha nor have I read the Manga (sadly) I do Google things quite a bit though and tried to get my story accurate. I also hope Sesshomaru is in character. He may be a tad OOC because Ikigai is his pup and therefore he has a protectiveness now. But yeah. So enjoy.

Oh! Harriet's name, well I only name a fem!Harry Harriet if they will go by a different name most of the time. Ikigai, while not an actual Japanese name is the word used for saying something is the reason for waking up in the morning, someone's reason for life. So for a father to say his daughter is his ikigai well it just struck me as extremely cute. So that is the inspiration for the fic's name.

Updates will be slow I admit but I wish to try and get out long chapters. I may have to Reread OotP to get scenes right. I am looking for a beta to help me with this, so please PM if you are interested. Hopefully I don't have many phone spellings(autocorrect) in here but I apologize in advance if I do.

Disclaimer: I don't own either Inuyasha (sigh) or Harry Potter (double sigh)

The Reason for Life

Prologue

Sesshomaru was very protective of what he considered his. His mate, a human woman by the name of Rin, was one of these things, his position as Lord of the Western Lands that he inherited from his father was another, but the one thing he was most protective of was his pup. The tiny hanyou was perfect to him. So much so that he named her Ikigai, and she was. The pup had his silver hair and two little dog ears on her head that were tipped in brown, her eyes were a mixture of Rin's chocolate brown and his own piercing amber. Ikigai was full of life, she was curious and stuck her nose into everything, she also tended to wonder around the palace that was her home, getting into all sorts of trouble, often times scaring her father to death with her daring. Being half demon, Sesshomaru's pup would age as quickly as human children until she reached majority, then she would stop, her Yōki kicking in and halting her humanity, but mentally she was quite advanced compared to her human counterparts. So when she was forced to stay in one place she would constantly ask either her parents or Jaken questions. To Sesshomaru Ikigai was exactly as her name meant, his reason for living. Then one morning she was just gone.

Harriet Potter hated life. She hated her school, she hated her friends, and she especially hated her relatives. The Dursleys had decided it was her fault that Dudley had almost gotten Kissed by Dementors and locked her in her room. The problem was that not only was it extremely hot in her room, she had been feeling off the whole summer and it put her in a bad mood. The fact of the matter was that she wasn't bothered by Cedric's death and that bothered her. Since when was she, the Gryffindor Golden Girl, not bothered by the death of her friends? It wasn't like she was desensitized, though very close to it, it was more of the mindset that he didn't matter to her, he was human and therefore beneath her. Such a mindset confused her greatly.

It also did not help that her so called friends refused to talk to her and her hair was slowly turning silver. So here she was not freaking out over a murder that occurred before her very eyes, but she was freaking out about her hair changing color and her senses going into hyper sensitive mode an her friends wouldn't reply to anything she sent them. The fourteen year old just sighed and stared out her window, wishing for a change. It wasn't long before she fell asleep