Go Mikami is one half of the renowned Mikami Twins, alongside his twin brother Manabu Mikami, and together they are known for their tenacity and spirit. He is a student of class B at Suzuran, the high school known for its concentration of delinquents, where he and his brother jointly lead their class with distinction.

Described as tenacious, Go Mikami appears to be driven by a desire to prove his strength within the highly competitive and violent environment of Suzuran. His initial role in the story is defined by a bold challenge against Serizawa Tamao of class A, a formidable figure who leads the dominant Serizawa Army. This direct confrontation ends in defeat for the Mikami Twins, a loss that shapes their subsequent actions. Rather than remain isolated after this failure, the twins choose to align themselves with their former adversary, joining the powerful Serizawa Army faction.

Go's key relationships are primarily defined by his bond with his twin brother, Manabu. They act as a unit, challenging others and fighting together, as demonstrated when they successfully take on the Ebisawa Brothers from the rival Housen Academy. Their loyalty, however, appears pragmatic. Following the eventual defeat of the Serizawa Army at the hands of the Genji Perfect Seiha (GPS) faction, Go and his brother quickly change their allegiance, switching sides to join the victorious GPS. This shift illustrates a development from direct challengers to followers of the strongest power, highlighting a survivalist instinct within the school's constant power struggles. While notable for their collaborative fighting ability and team spirit, specific unique or exceptional abilities are not detailed beyond their effectiveness in battle as a pair.