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Best friend of Kate Ashley and good friend of Rachel, Rose and Claire up until her "death".
Background
Red Garden
At the start of the series, Lise was a best friend of Kate Ashley up until the night that Animus's forces killed her and attempted to revive her, but some of the Delores Clan kidnapped her "new" body during their ride and ran off to their base. With only her old body, the Animus members hid it in the woods and made it look like part of a series of "suicides" around New York. While Lula Ferhlan was training the main quartet, Lise was later revived with everything but her memory, which later got manipulated by Hervé Girardot, the saga's main antagonist. After escaping the Vivaleo Pharmaceutical Center (the Delores Clan's base), she was in her manifested state for a short time, but was later taken again only to be rescued by Kate and her friends. After the main quartet's final battle of the series, she died and her body was dissolved into Manhattan Island, which instantly became the flower bed which was dubbed as "Red Garden" in the OVA sequel, "Dead Girls".
Dead Girls

Louise's appearance in "Dead Girls"
In the sequel, Lise's reincarnate is the little sister of Edgar (Hervé's incarnate), Louise. She has a hidden fascination with The Dead Girls, because they are immortal beings. Later on, her plan to be with the Dead Girls forever was revealed during a battle between them and Edgar and was revealed to be an android. After the battle ceased, she and Edgar sunk into Red Garden together.
Lise Harriette Meyer isn't in any shows or movies? If that's not right, go add Lise Harriette Meyer to something!