Maxima/Story

Past
Maxima was a Canadian soldier who led a normal life until he found out that his comrade-in-arms Rocky was killed in an incident involving NESTS. To avenge Rocky, he decided to sacrifice his previous life; he had his face and name changed and his "ordinary" life destroyed. To infiltrate the cartel without being recognized, he had his body cybernetically modified by Dr. Makishima, hence his codename of Maxima. As a cyborg, his strength and reaction time increased to superhuman level with built-in weapons (an originally-blocked hand cannon and a powerful cannon-like weapon installed in his chest) and the ability to conduct instant data analysis. He also has some degree of cyberpathy (he is able to perform feats such as connection to the satellite via cybernetic part of his mind according to Maxima's personal story in KOF: Maximum Impact 2 and K' Team's story in The King of Fighters 2003). These systems are powered by a miniaturized nuclear reactor called the "Maxima Heart", although it's unclear whether his real heart remains as part of those 20% of his body which is still organic or if it was replaced with its artificial analogue.

NESTS Chronicles
He infiltrates NESTS and is assigned to be the partner to K'. They both defect from the cartel after K' encounters his clone, Krizalid, and grows sickened by the organization. Since then, he has become K's steadfast companion and he is often the one who enters both of them into the following tournaments. Throughout the saga he aids K' in his battle against Krizalid, Clone Zero and Igniz. With NESTS downfall Maxima successfully avenged his fallen comrade and visits his grave after the tournaments conclusion.

Tales of Ash
His satellite network and its ability to hack into banks helps support his and K' during their lives on the run. However, as of late, he notes that it is harder to cover up their tracks and they only have enough money to last a month or two. Like K', he is genuinely surprised to see their names in the KOF XIII lineup. Relenting to Kula Diamond's selfish act seeing as they have nothing better to do, Maxima is also interested in witnessing the consequences of their actions from the last tournament. In their ending, the team spend their vacation on a cruise ship; Maxima told K' to enjoy the fun, but the latter didn't seem interested, while Kula seems to have more fun, making a giant splash around the pool, washing other people ashore. Maxima orders a big ice cream treat in a giant glass cup with many cones around, despite his eatery for sweets, and manages to finish it off. After that, agents appear out nowhere in the cruise, and the 3 prepare to fight the agents with the power of NESTS.

XIV Arc
After the events of the previous tournament, the majority of their wanted posters had now been taken down in exchange for their strategic aid to Heidern and his forces. While this ended their status as suspected terrorist fugitives, it did not put an end to the shadowy organizations pursuing them. After K' and Maxima dealt with the pursuers, Kula contacts the duo, passing on a message related to former members of NESTS participating in the upcoming KOF tournament.

In their ending, they were ordered to attend Heidern's meeting to pass on information related to Verse. Once K', Maxima and Kula board the helicopter Maxima informs his partner that several bodies have emerged from the fragments of Verse and that some of those bodies have records from previous competitions while some have no records at all.