Of course Fiona has her own name authority record!

Following RDA 9.6.1.8, the name authority record for Real Non-human Entities should have a designation for type, species, or breed, in this case “Hippopotamus”:

    368  ǂc Hippopotamus ǂ2 lcsh

Following RDA 9.19.1.8, the authorized access point may include such a designation to distinguish from access points for people with similar names:

    600 00 ǂa Fiona ǂc (Hippopotamus), ǂd 2017-