Members of Kigasei Clan have unique bodies, which allow them to passively absorb natural energy. However, due to the constant intake of natural energy, they are mentally unstable, sporadically feeling sudden, uncontrollable urges to kill, causing them to go on a rampage. Their bodies also secrete special fluids, which through means of Senjutsu chakra allow them to transform parts of their bodies for several purposes. While varied by appearance and function from user to user and even from use to use, the affected parts of their skin change colour (the hair colour also may change) and if the transformation occurs in the eyes, they change colour as well. Seemingly, the risk of petrification from imbalance of natural energy appears to be nonexistent.