You're searching for hex values, so if the guard is level 55, you'll want to search for 37 hex.

And actually, the e5 in 0xe5c8f0 doesn't point to your character's name...that's just a coincidence. That whole number (0xe5c8f0, or 15059184 decimal) is the offset from the start of EQ's allocated RAM where the pointer to the structure that describes your character is stored. When you do es (or et or ew or ez), each line of output is formatted something like this:

0000: 11 11 11 11 11 11 11 11 11 42 11 11 11 11 11 11 .........B......

In this case, the 0000 on the left represents the offset from the start of the data structure being examined that the data on this line represents. The next 16 2-digit numbers are the hex values stored starting at that offset, and the dots to the right are the ASCII representation of those hex values (assuming that a given value has an associated printable ASCII character - lots don't). In this case, all 16 bytes stored starting at offset 0 of the structure being examined have a value of 0x11, except for the one at offset 0x09, which has a value of 0x42.