Other

Shūsuke Amagai

Jin Kariya

Hollow Ichigo

Most likely Ichigo's most complex relationship, "the hollow" is Ichigo's hollow side, and is therefore something of a split personality. Ichigo and the Hollow are in a constant power struggle with one another, as both wish to become the dominate personality. The Hollow apparently has more control over the power than Ichigo does, and is arguably the more powerful combatant. During battle, the Hollow tends to use rather brutal methods as a means to taunt Ichigo, and will openly insult him by mocking his apparent inability to properly defend himself from his opponents, and to protect his comrades from them. However, this is just a means for him to provoke Ichigo into relying on his inwardly animalistic self (effectively becoming more of a hollow) not only to defeat his opponents, but to obtain more power, and become stronger than both him and Zangetsu, thus serving as an estranged adviser to Ichigo about conflict. The motivation for this is still debatable; either Zangetsu himself may have influenced this, or the Hollow recognizes Ichigo's potential and wishes to obtain his half of the incredible power that they both share, either by becoming the dominant personality, or by allowing Ichigo to utilize his hollow's abilities whenever in combat.