"When" is not a pronoun. pronouns are used to substitute for nouns.
"When" is an adverb and, depending on the context, it may be an interrogative adverb (e.g. When are you going to be here?") or a relative adverb (e.g. I'll be there sometime in the afternoon.)
It can also be a conjunction (e.g. Give me a call when you arrive at the station.)
It is never a pronoun.
The type of pronoun that comes right after the verb is an object pronoun.
a nominative pronoun.
The pronoun 'its' is a possessive, singular, neuter pronoun.
The pronoun in italics is a personal pronoun.
Myself is a reflexive pronoun.
There is no type of pronoun called 'special pronoun' in English.
singular
Please provide the sentence so I can accurately determine the type of pronoun.
Yes, a subjective pronoun is a type of personal pronoun. A personal pronoun replaces the names of people + things. Subjective and Objective pronoun both belongs in the personal pronoun category.
The pronoun 'someone' is an indefinite pronoun, an unknown or unnamed person or a person of importance.
appositive
Yes, "pronoun" is a type of word that can be used in place of a noun such as "he," "she," or "it".