Ricochet will not trigger in your example. The Shield Guard model (the Soulless Guardian) was hit/directly hit/etc. instead of the model you originally targeted.
The Shield Guard model “suffers all effects”, and “being the model to Ricochet from” is one of those effects. (“Effects” either includes everything or nothing; there’s no textual core rules support that defines what is and is not an “effect.” If you make one exception, then we eventually end up with a completely arbitrary list of things the Shield Guard model does and does not suffer, which is needless complexity.)
Bonus reference:
Double-bonus preemptive call to @elswickchuck , because I’ll lay 9.8-to-1 odds that somebody’s going to ask for an Infernal ruling anyway. 