As we continue with Roma: The Novel of Ancient Rome, we get to the Gracchi. One of our protagonists here, Lucius Pinarius, is a sometime friend of the Gracchi, as his mother Menenia mother is a friend of Cornelia, "Mother of the Gracchi." The philosopher Blossius (Wikipedia, handle with care), is pictured as a former teacher of Tiberius Gracchus and lives in his household; he is the lover of the widowed Menenia.
After Tiberius has been murdered, Blossus escapes death but is sent into exile, where he participates in the revolt of Aristonicus and perishes.
Plutarch relates this in Parallel Lives: Tiberius Grachus:
[...] But Tiberius, being elected tribune of the people, entered
upon that design without delay, at the instigation, as is
most commonly stated, of Diophanes, the rhetorician, and
Blossius, the philosopher. Diophanes was a refugee from
Mitylene, the other was an Italian, of the city of Cuma, and
was educated there under Antipater of Tarsus, who afterwards
did him the honor to dedicate some of his philosophical
lectures to him. Some have also charged Cornelia, the mother
of Tiberius, with contributing towards it, because she
frequently upbraided her sons, that the Romans as yet rather
called her the daughter of Scipio, than the mother of the
[...] By break of day came one of the soothsayers, who prognosticate good or bad success by the pecking of fowls, and threw them something to eat. The soothsayer used his utmost endeavors to fright the fowls out of their coop; but none of them except one would venture out, which fluttered with its left wing, and stretched out its leg, and ran back again into the coop, without eating anything. This put Tiberius in mind of another ill omen which had formerly happened to him. He had a very costly headpiece, which he made use of when he engaged in any battle, and into this piece of armor two serpents crawled, laid eggs, and brought forth young ones. The remembrance of which made Tiberius more concerned now, than otherwise he would have been. However, he went towards the capitol, as soon as he understood that the people were assembled there; but before he got out of the house, he stumbled upon the threshold with such violence, that he broke the nail of his great toe, insomuch that blood gushed out of his shoe. He was not gone very far before he saw two ravens fighting on the top of a house which stood on his left hand as he passed along; and though he was surrounded with a number of people, a stone, struck from its place by one of the ravens, fell just at his foot. This even the boldest men about him felt as a check. But Blossius of Cuma, who was present, told him, that it would be a shame, and an ignominious thing, for Tiberius, who was the son of Gracchus, the grandson of Scipio Africanus, and the protector of the Roman people, to refuse, for fear of a silly bird, to answer, when his countrymen called to him; and that his adversaries would represent it not as a mere matter for their ridicule, but would declaim about it to the people as the mark of a tyrannical temper, which felt a pride in taking liberties with the people. At the same time several messengers came also from his friends, to desire his presence at the capitol, saying that all things went there according to expectation. And indeed Tiberius's first entrance there was in every way successful; as soon as ever he appeared, the people welcomed him with loud acclamations, and as he went up to his place, they repeated their expressions of joy, and gathered in a body around him, so that no one who was not well known to be his friend, might approach. Mucius then began to put the business again to the vote; but nothing could be performed in the usual course and order, because of the disturbance caused by those who were on the outside of the crowd, where there was a struggle going on with those of the opposite party, who were pushing on and trying to force their way in and establish themselves among them.
[...] Diophanes, the orator, was slain, and one Caius Villius cruelly murdered by being shut up in a large tun with vipers and serpents. Blossius of Cuma, indeed, was carried before the consuls, and examined touching what had happened, and freely confessed, that he had done, without scruple, whatever Tiberius bade him. "What," replied Nasica, "then if Tiberius had bidden you burn the capitol, would you have burnt it?" His first answer was, that Tiberius never would have ordered any such thing; but being pressed with the same question by several others, he declared, "If Tiberius had commanded it, it would have been right for me to do it; for he never would have commanded it, if it had not been for the people's good." Blossius at this time was pardoned, and afterwards went away to Aristonicus in Asia, and when Aristonicus was overthrown and ruined, killed himself.
After Smyrna one comes to Leucae, a small town, which after the death of Attalus Philometor was caused to revolt by Aristonicus, who was reputed to belong to the royal family and intended to usurp the kingdom. Now he was banished from Smyrna, after being defeated in a naval battle near the Cymaean territory by the Ephesians, but he went up into the interior and quickly assembled a large number of resourceless people, and also of slaves, invited with a promise of freedom, whom he called Heliopolitae. Now he first fell upon Thyateira unexpectedly, and then got possession of Apollonis, and then set his efforts against other fortresses. But he did not last long; the cities immediately sent a large number of troops against him, and they were assisted by Nicomedes the Bithynian and by the kings of the Cappadocians. Then came five Roman ambassadors, and after that an army under Publius Crassus the consul, and after that Marcus Perpernas, who brought the war to an end, having captured Aristonicus alive and sent him to Rome. Now Aristonicus ended his life in prison; Perpernas died of disease; and Crassus, attacked by certain people in the neighborhood of Leucae, fell in battle.
Blossius committed suicide, Pergamum became the Roman province of Asia.
Note: This is the only version of the text I could locate.