Structolloid hull
A biologically grafted metalloid hull, Structol (a type of Sourcian) is evolved and bred to absorb to exhibit traits of complex alloys and metallic structures yet heal like a living thing. Structol is able to rebound physical impact and deflect energy based weapons by using a highly constricted Casmir field across its hull preventing any object with an atomic mass from penetrating it unless it packs sufficient kinetic energy. When the hull is at full charge, it vibrates out of phase at the Planck scale, forcing particles and waves with a low density to rebound from it's surface, absorbed and thrown from it. The fully charged state cannot be maintained infinitely though it is self-sustaining until an impact is delivered at which point it must recharge after it's capacity has been depleted on the specific part of the armor. Structol is also highly flexible despite it's great thickness and able to extend and warp to envelop new components meaning the ship is able to continue growing long after it's conception.