Apollo

Apollo, Greek Sun god.
Twin brother of Artemis.
Present at Fionn Corvin's birthday party in Halloween 1985, positioned as a guard by Zeus to keep a close eye on Erebus.
After the party ended he independently followed Erebus to convince him to end his hostility with the Olympians. Erebus mocked him for his attempt, bitter in his hatred of Zeus for banishing him to Tartarus, like some 'Titan scum'.
Seeing Erebus was beyond convincing Apollo turned to leave. He walked away feeling as weak as a mortal, as weak as Zeus in his arm-wrestle against Fionn... and realised that Erebus must be signifcantly weaker on Earth, too. Weak enough to kill.
Impulsively he summoned the sun's power and turned around with a knife drawn to end the God of Darkness' life. But he was too slow for the ever-ready Erebus, who obscured the sun with some dark clouds and turned the blade against Apollo's own throat. Erebus left Apollo to bleed out in agonising pain amongst the Douglas Firs.
Fionn happened upon the body later and urgently flew him up beyond the clouds to gain strength from the Sun... but his body burned to dust in his arms. Apollo was dead.
Apollo's death inspired Artemis to join Fionn's mission in rescuing Lucifer, though her interest lay solely fixed on the death of Erebus. Fionn accomplished this during The Tartarus War and she tearfully requested Erebus' small, black heart as a trophy. Fionn obliged.