There are at least seven parties who rejoice at the repenting of a soul.
1. The Father (Zep 3:17).
2. The Son (Luk 15:6).
3. The Holy Spirit (Luk 15:9).
4. The angels (Luk 15:7).
5. Loved ones (Hbr 12:23).
6. The Church (Act 15:3).
7. The one who repents (Luk 15:24).