A person who is seen as a shadowy figure in society or a frequent visitor to places without a solid presence.

छायादार व्यक्ति

English Usage: He was considered a ghost of the party, always present yet never fully engaged.

Hindi Usage: उसे पार्टी का एक छायादार व्यक्ति माना जाता था, हमेशा मौजूद लेकिन कभी पूरी तरह से शामिल नहीं होता।