He becomes the dagger in the dark to fill his empty halls
He used to wander, distressed by echoed calls
Now they house secrets acting as his beacons
Can't be a purposeless soul, he adopts a black hole role
A dagger in the dark is a term for an unseen catastrophe. The boy in the corner attempts to find some purpose in life, as he appears to have no chance attaining one that involves interaction with other humans.
The empty halls here parallel the hallways in his school. In his internal, metaphorical halls, there was nobody that walked them with him, no friends. Thus he became saddened, crying out for a companion in distress, but there were no others, resulting in only echoes.
His role as a shadow is similar to a black hole because everything revolves around him, with him attempting to draw closer, but with utter ineffectiveness. Instead, he absorbs small particles like information, while holding no large bodies like planets (friends) into his heart.
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