So, just to be clear, are you suggesting something like:
Cocoadaemon
Tiny Construct (Extraplanar, Yugoloth)
Alignment: Always neutral
According to myth, these creatures were created by a yugoloth lord to tempt non-evil casters with their chocolatey deliciousness...
If so, giving them the Yugoloth subtype seems kind of pointless, but if you're both so keen on it I suppose I could meet you halfway.
...a solar then developed the chococherub, a construct with identical statistics to a cocoadaemon except it has the Angel subtype. If a spellcaster summons both a chococherub and a cocoadaemon, the two constructs will take every opportunity to insult the other and persuade the caster towards their ethical point of view, usually while sitting on the caster's shoulders.
What say you?