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Professor Malveaux (Japanese: マーブル博士 Dr. Marble) is a character of the day who appeared in Crisis at Ferroseed Research!. He is the director and leading researcher of the Ferroseed Research Institute.
Malveaux was in an academic meeting when an experiment, which involved electric stones from Chargestone Cave and the Ferroseed held at the Institute, went out of control. Thus, he was shocked when he arrived at the Institute and found out that building was almost entirely covered by moss produced by the Ferroseed.
Malveaux hurried inside and met up with Ash, Cilan, and Georgia. He then followed, on the monitors, how Iris (who had been trapped on the roof) was doing with wiping out the spreading moss. Afterwards, Malveaux went through the building with Cilan and Georgia, removing the moss with help of Georgia's Beartic and using a special device to save the Institute's overcharged Ferroseed. In the end, with all of the moss removed and the Ferroseed cured, his Institute was saved. It seems he cares deeply for the Ferroseed, as indicated by how he hugged them when they were cured.