I don't know who the main characters are as I haven't had the chance to read this novel. But they could be people who are involved in the experiences of unconditional love within the '22 minutes' mentioned in the title. Maybe there is a protagonist who discovers the true meaning of unconditional love during this time, and there could be other supporting characters who either help or hinder this discovery.
I'm not sure as I haven't read it. But it might be about the concept of unconditional love, perhaps exploring different relationships where this kind of love is present.
One example is the love between Atticus Finch and his children in 'To Kill a Mockingbird'. Atticus shows unconditional love by standing up for what is right and teaching his children moral values, no matter the social pressure. He loves them wholeheartedly and wants them to grow into good people.
Sacrifice also plays a big role. Take Romeo and Juliet for example. They are willing to sacrifice their lives for their love, which is an extreme form of unconditional love. Their families' feud doesn't stop them from loving each other.
In 'Wuthering Heights', Catherine and Heathcliff's love, though complex and often destructive, has an element of unconditional love. Their love for each other is so deep - rooted that it defies social norms and time. Even after Catherine's death, Heathcliff's feelings for her remain intense and unchanging.
Communication is a vital element too. In an unconditional love story, the characters communicate openly. They share their feelings, fears, and joys. This helps them to understand each other better and keeps their love strong. Also, loyalty plays a role. The characters are loyal to each other through good times and bad, which is a characteristic of unconditional love.
Blue Angel could be a very interesting addition to a Twilight fanfic. If the story focuses on unconditional love, it might show a different kind of relationship than the ones in the original series. Maybe Blue Angel has a special ability related to love that allows them to love unconditionally in a world full of complex relationships like Twilight.
Unconditional love in novels can be shown through sacrifice. Take 'Les Misérables' for instance. Jean Valjean shows unconditional love towards Cosette. He sacrifices his own freedom and safety to protect her and give her a better life. It's a love that doesn't ask for anything in return and is willing to endure great hardships for the beloved.