The characters are best friends forever - a bond of friendship stronger than simply
The promise of lasting friendship is Blood Brothers, but when we can see that it is a real lasting friendship we know that they are best friends in the most genuine sense. It's generally seen in a Friendship Moment. They might be a united group of True Companions. If they have romantic feeling for each other but don't want to admit it then they really mean it when they say I Don't Want to Ruin Our Friendship. If the two people of the opposite gender are always spending time together without romantic feeling they're Platonic Life Partners. If they're of the same gender they're Heterosexual Life-Partners. The life partners though, are more about being in the moment of friendship then knowing they can count on each other whenever they need to.