Gareki and Nai have a very close relationship, both showing great care and concern for each other. Although Gareki originally protected and provided for Nai purely for selfish reasons, he soon begins to take care of Nai and becomes his surrogate older brother. Nai also shows that he cares for Gareki when he tries to distance himself from him because Karoku asked him, "You don't want him to break, do you?" Because of this, Nai ended up pushing Gareki away in order to protect him. Gareki, not knowing Nai's true intentions, reacted negatively to this which resulted in Nai breaking out into an outburst of tears. However, the conflict was later resolved and Gareki and Nai are able to become close again.
