The "helper" is the Paraclete (Greek - parakletos παράκλητος, Latin - paracletus). The Paraclete is the Holy Spirit.
Peace be with you
Yes, but that same term is used in 1 John where John says specifically that it's Jesus Christ:
1Jn_2:1 My little children, these things I write to you, so that you may not sin. And if anyone sins, we have an Advocate(parakletos) with the Father, Jesus Christ the righteous.