I feel like there's nothing wrong if the spirit and her get together when she's older. He isn't a groomer unless he has malicious intent. From the NSPCC website, "Grooming is when someone builds a relationship, trust and emotional connection with a child or young person so they can manipulate, exploit and abuse them." Also, to me, the spirit has never established a true guardian/child relationship. It was more of a friend relationship so I consider him and her to be childhood friends that will eventually get married