Ubaguzi is an old Pridelander lioness, and a minor character in my (Ladybernard's) fanfiction, Lion King 3: Hyena Rules.
She is not included in Upelelezi's Journey because by this point she will have passed away.
Ubaguzi is a very old lioness, who has lived since Scar's reign, and because of this doesn't trust the hyenas (or the former Outlanders, for that matter). Although she says that she is fine with the Outlanders (Ander, to be specific) she also thinks that they have "bad blood". She seems to especially not like Ander (even giving her a dirty look as she leaves with Simba), and this could be because she fought with Ander during the war.
Ubaguzi is an old Pridelander lioness with a heavy build, similar to Sarabi's. She has a light golden coat and a milky-colored underbelly. Her nose is reddish colored, and she has no ear-rims. Ubaguzi's eyerings are a dark, yellowy cream, although her eyelids are light brown. She has thick eyebrows and long eyelashes, and her inner ears are light brown.
It is revealed in her cubhood picture, that Ubaguzi has a gray-brown colored tail-tuft, orange eyes, and as a child was very scruffy around the elbows, chest, chin and cheeks.
Ubaguzi does appear in both TLK and TLK2, only as a background character, and she is hard to spot (but can be seen in the pictures below). She even appears in one of the TLK comics, The Shooting Star.