Asgore
Asgore is the king of the Underground and the barrier of many Neutral endings in Undertale.
Story role
Asgore Dreemurr rules from New Home. He collects human SOULs to break the barrier and is framed as both gentle gardener and final obstacle.
Boss fight
Expect trident patterns and long phases. MERCY options exist but Neutral still forces a surface-ending sequence involving Flowey afterward.
Pacifist note
True Pacifist reframes the New Home confrontation after True Lab. Complete friendship flags before you expect that version.