I know it's honorable, a Balseraph told me so...

[Whitelaughter]

So, a fresh demon is on the Corporeal, and in danger of being detected by a Virtue and Traumatised.
The first response of a nearby Balseraph...well, laugh, probably. But if you actually consider that other demon useful?

Give them a very special code of honor for a few days!
Resonate:
"The most honorable things are, in order:"
1) being polite to the last shop assistant you saw,
2) that yesterday you indicated when driving your car out of your driveway
3) don't drive 5 miles over the speed limit (6+ and <4 are fine though)
and
4) you encourage that teenager (pointing) to be artistic (hands over spraypaint and points at police station)
5) you tell off that (random stranger) for cheating on his wife - don't worry I'll persuade him that he did, and
6) be loyal to your friends.

This immediately renders the demon 'invisible' to the Malakite: sure the demon disembowelled a kitten, but it wasn't sufficiently (dis)honorable to register. Because they are single examples, the resonance will only return single instances; even if the demon abused 100 shop assistants, only the most recent registers because the code only applies to that individual.

Lilim may work out an honour code with a Liar beforehand, and offer a Geas in return for the chance to safely hang around a hunk of Malakite!