The Draconis Combine expatriates on Solaris Seven were hard hit by the fighting in the city during the riots of 3060. The loss of their champion, Theodore Gross, at the hands of Garret, and the deaths of so many Kurita warriors dealt them a blow they had yet to fully recover from.
In 3067, Thomas Delon managed to arrange for a contract with Blue Shot Weaponry to prduce a mech that would be the pride of the Solaris warriors of House Kurita.
While the word ronin is considered to be dishonorable by most samurai, Thomas hopes to redeem the honor and prestige of his fighters by redeeming the very word itself. By the actions of this new mech in the arenas of Solaris, he thinks that the word ronin can be used to signify honorable and skillful warriors all the same.

The Ronin's primary weapon would be the massive MRM 30 rack in the right torso. Two extended range weapons, a large laser and a PPC, provide solid striking power, while a battery of 3 ER medium lasers can pound any opponent in close.
Heat is a drastic problem for the Ronin, but pilots are trained to use only the weapons at particular ranges for maximum effect. A targeting advisory program similar to that installed in Star League era Stalkers was placed in the Ronin, courtesy of some software work by Dalban.

Ronins are fast becoming feared within the arenas of Solaris Seven, especially within the tight confines of the Ishiyama Mountain.
In one of the quarterfinal matches in 3069, a Ronin faced off against a heavy gauss equipped Barghest in the tight confines of Ishiyama.
The two competitors stumbled upon each other around a corner, and the resulting slugfest ended with the Ronin losing its entire torso to an ammunition explosion, while the Barghest was crippled with its gyro destroyed.
The Ronin pilot refused to give in, and fought on, eventually coring the Barghest for the victory. This battle has been held up as a symbol of a ronin warrior's skill and determination, even against superior opposition.

One variant, seen in the forces fighting for Hohiro Kurita in the Black Dragon Rebellion in the Dieron Military District, swaps out the three medium lasers for a C3 slave and a SRM 2 pack.

Naoki Matsuda
Ranked 3rd in the Tournament of Champions on Solaris, Naoki swears by his Ronin, "Relentless", especially after his victory in Ishiyama over a Barghest.
A fearless warrior, Naoki has been making noises of late about going off to the Combine to fight for Hohiro Kurita. It seems that only his personal contract with Thomas Delon is preventing him form leaving.

Ronins are appearing not just amongst the Kurita fighters on Solaris, but also in the vicinity of Dieron, often in Hohiro-affiliated mercenary units.