Just a bit more regarding Pupienus and Balbinus.
Their coinage in numerous instances utilized the imagery of clasped hands as a reverse motif. For Pupienus, alternative legends were CARITAS MVTVA AVGG and PATRES SENATVS. Balbinus' read PIETAS MVTVA AVGG, FIDES MVTVA AVGG, or CONCORDIA AVGG.
So the picture being promoted through their individual issues was that insofar as both their working and personal relationships were concerned there was a state of harmony, cordiality, faithfulness, singularity of purpose, and good will existing between the two men, which seems to stray rather far from the truth on every count. It may be that at their advanced age (Balbinus was 60, and Pupienus at least 70 years old), their widely differing backgrounds and ossified outlooks precluded anything but a contentious alliance.
Colligo ergo sum