The Dreaded: The Silver Tribe is a little fearful of him, due to him giving humanity the weapon they need to finally start winning some battles against the former. And just about every attempt they make at stopping him fails.
Messianic Archetype: In fact, he's the only man who is able to be physically close to Dhianeila without her collapsing, presumably due to his innocence.
Nice Guy: He's quite a friendly person, and even befriends several of the antagonists as the show progresses.
Person of Mass Destruction: Bellcross can destroy quite a few ships on his own as the Bronze and Silver tribes find out the hard way.
Staying Alive: Bellcross has the power of "existence", meaning that he simply can't be killed. At one point, Lecty/Erymanthos tries using her time travel powers to kill him when he is at his most vulnerable — and fails 20,000 times.
The Princess and leader of the Iron Tribe. She has considerable psychic abilities, but her inherent telepathy has made her extremely sensitive to other people's thoughts, as such she is usually isolated and attended only by her handmaidens.
Astral Projection: One of her abilities. Due to her sensitivity, she usually uses it to communicate with others without being physically present.
Head of the Yunos Knights, and son of the Argonaut's captain. He has minor psychic powers in the form of Teleportation. He harbors a crush on Dhianeila, and is often disapproving of Age's less serious antics.
Dhianeila's elder brothers, the first and second princes of the royal family. They are very concerned with their own political gain and have dreams of winning glory in battle against the Silver Tribe. Unfortunately, they have no grasp of military strategy and are utter cowards when things don't go their way.
Attack! Attack! Attack!: The only "strategy" they really know. The Silver Tribe takes advantage of this repeatedly to lure human fleets into traps.
General Failure: Almost all of their military successes is due to Age and Dhianeila. Without them, they are pretty worthless in combat.
Glory Hound: Pretty much their defining character trait.
Karma Houdini: What do they get after all the trouble and death they cause throughout the show? A cushy job with a fair amount of power (albeit subordinate to Dhianeila).
The All Solving Hammer: Atalantes in particular is rather fond of using the Althea's main gun on their problems.
The Scrappyinvoked: Both in and out of universe. Several of the more competent military commanders privately express their contempt of the princes, and they aren't too well-liked among the fans either.
We Have Reserves: Another reason their subordinates don't particularly like them. When deciding to ignite a fusion reaction in Jupiter's atmosphere, Nilval points out that their fleet will be damaged as well. Atalantes's response is a nonchalant "Some losses are inevitable."
Another leader of the Silver Tribe, she is highly philosophical and greatly respected by her race. Throughout the series she ponders the Golden Tribe's intentions and what exactly is the meaning of the war with the Iron Tribe in that context.
The Silver Tribe's Nodos, a cold girl who is dedicated to her duty. Her Nodos, Cervius, possesses one of the Heroic Tribe's most destructive powers, and she is considered the Silver Tribe's final ace in the hole.