Is fragrant a pronoun

No, fragrant is an adjective, a Word that describes a noun: a fragrant flower, a fragrant bread.

A pronoun is a Word that takes the place of a noun in a sentence; for example:

The fragrant candle gives a relaxing air to the room and it has a pleasant glow.

The adjective 'fragrant' describes the noun 'candle'; the pronoun 'it' takes the place of the noun 'candle' in the second part of the sentence.