César

Caesar's Signature and by far her best engine. It unconditionally grants 18% Impact and 30% larger Shields for the wearer, greatly enlarging her Aegis Shield and lifting her Daze. Whenever any party member triggers an Interrupt or Perfect Dodge, the whole squad also gains 18% DMG and 12% Daze for 20 seconds, elevating both her support and Daze output.

The only other Daze-oriented Defense engine besides Caesar's Signature. It offers huge unconditional HP% and Combat HP%, plus a temporary Combat Impact% boost after she is hit. That boost is short-lived and her Aegis Shield scales only with base Impact, not Combat Impact, so an S or A-Rank Stun engine wins unless you specifically need the HP.

An Energy-focused engine with a side of ATK%. After taking damage the wearer gains 16% Energy Regen for 12 seconds at max rank, and the buff transfers to whoever you switch to. Caesar's Defensive Assist-heavy playstyle triggers it constantly, so it is easy to pass to an ally of choice. Pick it only if you want the Energy Regen; otherwise Impact engines give better Shields and Daze.

An Anomaly-flavoured damage option whose niche is boosting Caesar's Anomaly buildup, useful in Anomaly teams aiming for Disorder. The cost is lost Daze and Shield potency, a trade-off that rarely pays off.