Today, police released pictures of a person with dark hair, wearing a grey hooded sweatshirt.
Police said they believe the person may be able to help with inquiries into the incidents.
The reported assaults happened in the Wigram and Hagley Park areas over the past few months.
Anyone with information is advised to contact police using 105, referencing file number 260526/3183.
Information can also be shared anonymously with Crime Stoppers on 0800 555 111.