Tensei Youjo. Kamikemono To Ouji To, Saikyou No Ojisan Youhei-Dan No Naka De Ikiru.

Lise found herself alone in a strange meadow in the shape of a girl. Also, there is a big dog in front of her. There wasn't a dog like that in the neighborhood, and that's when Lise was convinced. I see This is what they call reincarnation in another world! Then, a group of muscular mercenaries appears in front of Lise. It seems that they have come to defeat this dog. But to his surprise, this dog is a divine beast! Ranagh, the divine beast, has grown fond of Lise, who is the only one who can understand him. So, the leader of the mercenary group, Arlagia, offers to protect Lise and Ranagh with his mercenary group.....? A young girl, a divine beast, and the strongest group of mercenaries. A wacky otherworldly fantasy with a cast of unorthodox characters.