basically those of us who complete the great hunger event can get a special item to get Laharu to take up a submale slot and do the job he gets replaced with each great hunger... He has flavor text of his own mostly about him finding food and eating it or a buff in adolescent experience stating ex "Laharu showed *insert Adolescent name here* something that only a hyena would think to notice and *adolescent* learned a bit more than a normal patrol."

you can't decorate him but he offers a training boost

from a gameplay standpoint minus looks all submales are good for is training up adolescents and tusseling and tbh Laharu can do both

edit: Laharu does prove his value during the current great hunger event which is why this particular chubby striped hyena would hang around your pride and your king has made him useful before so he might just do it again. You must complete the story for that month to get Laharu...