Normally recognizable due to their gigantic sizes, either in general or to other yukkuris, dosuyukkuri (dosus) are typically the bosses or chieftains of a yukkuri clan. Yukkuris who are long-lived and/or especially easy may grow to become dosus, although Marisa is by far the most common type of dosu. Trained dosus may be used by humans to regulate artificial clans.
They are occasionally portrayed as having a "dosu_spark", a laser attack similar to the real Marisa's Master Spark. Sometimes, this attack is performed by eating "dosu mushrooms" that they can locate or grow.