"KE" often stands for "Kaneko" (an arcade developer) or specific "King Edition" game repacks.
When a file is too large for certain storage systems or upload limits, it is split into "parts." KE1.part5.rar
The .part5 tag means this is the fifth chunk of a larger set. "KE" often stands for "Kaneko" (an arcade developer)
Ensure you have parts 1 through 4 (and any subsequent parts). Kingdom Estate or Knight Echoes ).
The .rar extension indicates it was created using WinRAR.
It may represent a specific TV show or movie series (e.g., Kingdom Estate or Knight Echoes ).