Fenrir

Loki039s first son takes the form of a small black dog. His real identity is that of the Fenrisulfr a giant wolf bound by the gods. Fenrir enjoys food and taunting Yamino. A running gag in both the anime and manga is how Fenrir can be very bossy and intentionally crude around Yamino then instantly become the most affectionate and harmless puppyson possible the moment quotDaddyquot walks in during the series he has an almost scary Father Complex. He039s very outwardly protective of Loki spouting threats when Loki may be in danger. While the gods can understand his words it would appear that when a human hears him talk all they hear is a regular dog though his barking sounds like he039s singing.