coward
Yukkuris who aren't delusional tend to be cowardly as they're self aware of how easy it is for them to die. But this tag is used for yukkuris displaying particularly pathetic cowardism.
For example:
For as much flaws yukkuris have they do tend to have strong familial bonds and will try to save their family in the face of danger. So it's particularly cowardly when a yukkuri (especially an adult one) abandons their family and runs away in the face of danger, potentially leaving their family to die.