Switchboard Operator (uncredited)
Funloving Pearl White, working in a garment sweatshop, gets her big chance when she "opens" for a delayed Shakespeare play...with a comic vaudeville performance. Her brief stage career leads her into those "horrible" moving pictures, where she comes to love the chaotic world of silent movies, becoming queen of the serials. But the consequences of movie stardom may be more than her leading man can take
Lady Diana Blanton
From the Universal synopsis: Retired Inspector Blake of Scotland Yard learns that Lord Blanton has acquired the sacred "Love Ring"---a cursed jewel that has brought grief to its previous owners. Prince Darius seeks to obtain the ring, and the mummy of a princess of an ancient country to return them to his homeland.
Adrienne
Michael Lanyard, a reformed cracks-man, adopts Adrienne, the daughter of an old friend, and goes to Southampton to attend a party celebrating her engagement to Bobby Crenshaw, the son of a wealthy society couple. The Count and Countess Polinac, international jewel thieves, also attend the party, and Count Polinac forces Lanyard to open the safe containing the jewelry of the guests by threatening to expose Lanyard's criminal past. Lanyard forestalls the count, however, and protects the valuables. The count and countess are arrested, and Michael's secret is kept safe.
Helen Grayson
Larry Grayson, jazz age son of permissive parents, drifts from wild parties with his classmates to more heady, roadhouse entertainment. There he becomes involved with an underworld gang and falls in love with Spanish Marla, one of their vamps. Larry leaves home after an argument with his father, throws in with the gang (who are using him for their own purposes), and is blamed for a murder. Tried and convicted, Larry is given a light sentence when the judge places most of the blame on his overindulgent parents.