The Deceased
Scholars have said that if a dreamer sees a deceased person in the abode of truth (i.e., in a maritime context or a ship), it may indicate the dreamer's salvation from the terrors of hellfire and their attainment of God's mercy.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam
Note: These are traditional scholarly interpretations (ijtihad) drawn from a specific classical source — not a binding religious ruling, fortune-telling, or a prediction of the future.