* Angelic creatures cannot equip or use this weapon, and would hurt themselves if they tried or were forced to touch it. This extends to shrine maidens.
* '''Cleansing Fire effect:''' For every Angelic creature killed using this weapon, the weapon gains one "Charge" point, up to a maximum of 6. The weapon gains LDV equal to its amount of Charge points (at the maximum of 6, it effectively reaches LDV+4). At any given moment, if the weapon has at least one Charge point, the user may use a special ability called '''Cleansing Fire'''. Upon activating this ability, the weapon deals quadruple damage to Angelic creatures instead of double damage, but this effect lasts only one turn. On the turn following the use of Cleansing Fire, Charge points are reset to 0 and the weapon loses 200 Condition instantly.
* Dark maidens possess the ability to freely add Charge points to their Shaku by spending Demonic Energy points: 1 DE for 1 Charge point.
[[Category:Class 5 Short weapons]]