Guts is purely fictional. It's a concept or character that exists within the realm of imagination and creative storytelling rather than being based on reality.
If this Suresh Raina is a public figure known in a particular community or field, more details need to be provided. Maybe he has a private love story that only his close friends and family are aware of.
In fact, 'Sisters' is a true story. Raina Telgemeier often draws inspiration from her real life for her works, and this one is no exception. It gives an authentic and heartfelt account of sibling relationships.
Yes, 'Sisters' by Raina Telgemeier is based on her own life experiences and can be considered a true story with some fictional elements for artistic expression.