Alex,
Yes, that was the case. I have tested with:
1. Default 1252LATIN1 for Char and UTF8BIN for NCHAR
None of char, nchar, varchar, nvarchar properly saves ē and replaces it with substitution character (appears as a blank character)
2. dbinit test.db -zn UTF8BIN
This is the same as case 1. Result is also the same
3. dbinit test.db -z UTF8BIN -zn UTF8BIN
Refer to the attached screenshots: