Unit Description: Although the Hyaku Shiki was an experimental model, its high mobility and Captain Quattro's exceptional piloting skills allowed it to continue fighting on the front lines. However, it was beginning to struggle to compete with the cutting-edge mobile suits of the Titans and Axis.
Following the Dakar speech, the AEUG, unable to afford to lose Captain Quattro, began planning equipment to strengthen the Hyaku Shiki to its limits.
Due to the overlapping development engineers with the S Gundam (ExS Gundam), which was being developed at Anaheim at the same time, there are many technical similarities.
Defensive capabilities are provided by small generators mounted on both shoulders, whose output is used to power I-fires on the chest and waist.

Hyaku Shiki Ex-A (Ikusa) | ポポロン's Gunpla works