The correct relative pronoun to complete the sentennce is as follows; "mi padre es la persona que me acompaña al altar."
In English language, there are seven (7) main types of pronouns and these include the following:
- Relative pronouns
- Reflexive pronouns
- Indefinite pronouns
- Personal pronouns
- Demonstrative pronouns
- Interrogative pronouns
- Intensive pronouns
- Possessive pronouns
Generally speaking, a reflexive pronoun is a pronoun that refers to another noun or pronoun in the same sentence. Hence, the correct relative pronoun to complete the sentennce is que.