Mathias

Mathias was the father of Hawking and grandfather of Tobor, making him the oldest living Guardian by the time of Knuckles. Mathias served with the Brotherhood of Guardians all his life, growing a strong hatred of the Dark Legion and becoming popular among his bretheren, especially Locke. As the years went by, Mathias became learned and wise and eventually succeeded in ascending beyond his physical form, though he lost functionality of his eyes. Mathias eventually retired from his duties in Haven, and travelled to another dimension to spend the rest of his life in quiet meditation (The exact amount of time Mathias spent in another dimension is unknown, as the concept of time had become irrelevant to Mathias, though it was at least many years due to Locke remembering it had been so long dince he was last in Haven).

Mathias was at peace with his surroundings, though his time there was brought to an end when suddenly a disturbance rippled across his dimension's plane of existence. Instinctively, Mathias knew only one being who would dare breach the fabric of existence, and he observed from his dimension that the being; Dimitri, preparing his forces for "Armageddon" (really yet another offensive against the Brotherhood and Echidnaopolis). Mathias promptly returned to Haven, and upon reuniting with his bretheren, marshalled the Brotherhood for a preemptive strike against the Legion, as he sensed Dimitri would unleash his dark forces upon the innocent unless action was taken, and hoping whatever plans Dimitri was enacting would be thwarted. The Brotherhood unanimously agreed, and they teleported away.

Mathias traced the Legion to their most recent stronghold, and was shocked to find the Legion based at the Grand Conservatory, though Locke knew there was no better hiding place (as it was where the Echidna's had stored there renounced technology). The Brotherhood then launched an attack, with Spectre dealing with the sentries, and Mathias, after putting an end to a sudden burst of in-fighting and urging them to stay united, lead a meld of their powers with devastating effect, destroying Legion weapon trucks and engulfing the base in flames.

It was at this time Mathias's comatose son, Hawking, finally succumbed to his condition and was led to the afterlife by Steppenwolf.

Dimitri, while on the command centre of the Dark Legion Battle Cruiser, knew the Guardians were poised to interfere, was left with no choice but to unleash the Legion's ultimate weapon; the Quantum Beam Cannon, which caused the entire population of the Floating Island to be shifted to the Twilight Zone. All the members of the Brotherhood, including Mathias, were caught up by the Quantum Beam's effects, though in his case (possibly due to his advanced age, his status as an energy being which left him vulnerable to the dangers of the Quantum Beam, or the mixing of the Quantum Beam energy field with the one he was producing with the Brotherhood's combined Chaos powers) the effects of the Quantum Beam killed Mathias.

Upon the Brotherhood's return, Locke was first to notice Mathias was no longer among them, but Spectre, possessing near-omniscience, quickly learned of Mathias's fate (along with that of Hawking and Tobor; having died destroying the Quantum Beam shortly before the Brotherhood's return) and informed his comrades he had joined his decendants in "the next evolution" (the afterlife).

Mathias, along with the rest of the deceased members of the Brotherhood (from Steppenwolf onwards) met with Knuckles following his own (brief) demise.