Banshee

Banshee (born Lio Excelsus) is a relativery young Titaniard, she came to life outside Gea Titania, just like many other of his species in modern days. Her parents are “unknown”  one of them in any case, was deadbeat af.
Banshee is the middle child of a batch of “false triplets” along her elder brother Goldhorn and the youngest sibling, Phenex.

They were brought back to Gea Titania by a fellow comrade of their deadbeat parent. Orphaned for the first 2000 years, Banshee assisted Goldhorn in order to lead his siblings for survival.
Quickly Goldhorn became more selfish and undisciplined so Banshee took over the lead as a better boss.(Banshee’s views and approaches were different from Goldhorn’s this take might be biased). They were thieves, and they made their home in a castle of garbage.

Banshee took on a “thief’s name” just like her siblings.

Later Xaharon, a well known bot, arrived and decided to keep the triplets out of trouble by “unceremoniously” adopting them. He took them to outer space and travelled with them.

The relations weren’t best to say the least. From awkward vibes to fighting the elder, both her and Goldhorn messed shit up to annoy their new mentor, while Phenex was obedient (dead inside tbh).
 They followed Xaharon around for 2 mil years, until they got lost in a nebula storm.
Banshee kept Goldhorn around, but she never forgave him for losing Phenex and Xaharon.

The 2 travelled planet by planet for another set of 1000 years before reaching cybertron. Where they parted ways.