|Name in Japanese||ストレングス|
|Appears in||Black★Rock Shooter (OVA)|
|Voice Actor (Japanese)||None|
|Voice Actor (English)||None|
|Human Counterpart||Unknown (implied to be Yuu)|
Strength's appearance in the OVA is nearly identical to how she appeared in her original concept. Unlike in huke's artwork, however, in the OVA, Strength's eyes are hazel (with the circular pattern akin to all "other selves") instead of white. The reason for this change is unknown, but it is very likely done to give a connection point to Yuu, as she is the only other character with hazel eyes and eyes are used as a connection point for "other selves".
Nothing is known about her personality, because she was only shown looking at her battlefield and jumping down a cliff.
She is shown approaching Black★Rock Shooter and Dead Master in their battle (but in a different part of the Otherworld), while at the same time Yomi's feelings of being "left out" grow darker. After jumping of the cliff, she has no other actions in the OVA.