Ikki and Kazu's relationship. Despite feeling inferior to Ikki in terms of ability, Kazu is fiercely loyal to him and often shows that he values Ikki's pride and well-being far beyond his own. For example, prior to Ats, Ikki had become the new leader of the East Side Gunz, but he abandoned this position to pursue his future in Ats. The former leaders of the Gunz offered Kazu the prestigious leadership spot of the Gunz in exchange for Kazu providing them with Ikki's head. In reply, Kazu fought all five of them at once; instinctively sticking up for Ikki.
Kilik was known to have a very close bond◊ with Sora when they were friends, as seen in the page image. Rika even states that "compared to everybody else those two are different". Not to mention the reversed tattoo on their backs◊, which display a word "飛地" literally meaning "enclave", "narrow range" or "inner circle".
Buccha and Orca. They became extremely good friends after their fight, with Orca doing everything with Buccha. In the final shot of the team, you can even see Orca riding in Buccha's pants like a baby Kangaroo in its mother's pouch.
And now for some Les Yay. Kururu asks how Ringo can carry money in her Croissant Mask costume, and Ringo shows her some money in her cleavage. Kururu immediately compliments said cleavage.