1. Michael and Skellig: The central relationship in the story is between Michael, a lonely and curious boy, and Skellig, a mysterious, otherworldly creature who lives in his garage. Their initially apprehensive relationship develops into a deep and transformative friendship as Michael learns about Skellig's origins and purpose.
2. Michael and Mina: Michael forms a close friendship with Mina, a wheelchair-bound girl living in a nearby house. They share their secrets and dreams, and their friendship provides emotional support and understanding to both of them.
3. Parents: Michael's parents, particularly his father, are depicted as distant and preoccupied. Michael struggles to connect with them and feels a sense of isolation within his own family.
4. Skellig and Mina's Grandmother: Skellig and Mina's grandmother develop a special connection. Mina's grandmother believes in magic and recognizes Skellig's true nature, leading to a mutually enriching relationship.
5. Community: The book portrays a close-knit neighborhood where various families and individuals interact with each other. Conflicts arise due to differences in beliefs and attitudes towards Skellig and his presence in the community.
6. Internal Conflict: Michael experiences internal struggles as he grapples with his feelings of isolation, loneliness, and the mysterious nature of Skellig. He faces the challenges of making sense of the extraordinary events happening around him and finding his own place in the world.
Overall, "Skellig" explores the themes of friendship, acceptance, and the power of imagination through the relationships and conflicts between its characters, highlighting the importance of understanding, communication, and human connection.