Jonathan's primary weapon is the Vampire Killer whip, which can be upgraded and imbued with various sub-weapons. Beyond the whip, he can also equip other weapon types such as Swords, Spears, and Knuckles. Each weapon type has different attack speeds, ranges, and damage outputs. Swords offer balanced stats, Spears provide reach, and Knuckles are fast but short-ranged. Look for weapons with high Attack power and beneficial stat bonuses like STR or CON. Some weapons also have elemental properties that can be exploited against specific enemies. Experiment with different weapon types to find what suits your playstyle and the current situation. The 'Alucard Sword' and 'Valmanway' are highly sought-after late-game weapons.
