Dr. Rosa Marquez was critically injured in the initial breach, losing her left arm. While attempting to activate Site lockdown procedures, one of SCP-3589's discarded human arms landed near her and fused itself to the stump of her absent appendage. SCP-3589 then lost control over its detached arms, all of which converged towards Dr. Marquez.

Over 200 arms surrounded Dr. Marquez. Several dozen fused to her at their bases, while the remaining limbs arranged themselves into a complex polyhedral cage. This cage contracted until it formed a spherical shell approximately 2m in diameter. It remained in this state for approximately 4 minutes, after which all arms comprising this structure disengaged and fell to the ground. SCP-3589 subsequently remained unable to feel or control any of these arms, although none of them have decayed.

No trace was found of Dr. Marquez.