.KAMUI. troubled, powerful, almost reckless youth destined to save the world at the cost of many lives, even those one's most important to him.
.SUBARU. quiet, refined, and like all CLAMP
chatracters, troubled. A good friend.
POINT 1
They are always there for each other in times of need. Most of the
times when Kamui is in a scuffle that could endanger his life,
Subaru is there to lend a hand or to take him someplace where he
can recuperate. EX 1: Early in the series Kamui was hurt, psychologically I suppose, and despite great personal risk Subaru dives into Kamui's turbulent mind to bring him back. He is successful yet during the whole process he is laying on top of Kamui between his legs. Hnnn.
EX 2: After a fight with Fuuma, Subaru loses the use of an eye. Kamui waits by his bed side holding his hand,
praying he'll get better.
POINT 2
Like Kamui and Fuuma, there is a lot of unnecessary closeness and contact between Kamui and Subaru. So often they are seen holding hands, holding each other, or having these sad, forlorn expressions whenever they have to part ways.
POINT 3
Towards the end of the series, Kamui goes off to fight Fuuma for the last time. Of all his friends, Subaru is the only person Kamui says good bye to. Subaru is the only person (other than Fuuma) he seems to truly open up with and can trust in the series.
POINT 4
During the last Kamui and Fuuma fight, Kamui was on the losing end then Subaru rushes in to save him, regardless of how tired and injured he already was from a previous fight.