While many mech pilots are so physically and mentally wrecked that their "retirement" life is catatonic misery, some of them crab bucket their way into the handler position.
Mercenary pilot: I HAVE MADE ENOUGH MONEY TO ESCAPE DEBT. NOW TO WRECK SOMEONE ELSE TO EARN MONEY FOR ME!!!
Some handlers really hate the idea of considering an ex-pilot an equal, so the viability of this path in any organization depends heavily on the handler clique at the organization.
Rimbaud: Well, if I can't pilot now that the M3 SABAV is being replaced with an incompatible system to my augments, maybe I can be a handler.
Hummel: We are not and never will be equals, pet.
Pilots-turned-handlers are never milquetoast.
You're either gonna get 15 new mental illnesses in the name of being the best pilot alive (lesbianism optional... maybe...) or you're going to get a fucked-up person's vision of "nice."
Depends if the pilot-turned-handler is closer to the "I got fucked up and survived and so can you!" end or the "I will protect them from all danger as I wish my handler had done for me" end.
Once in a while, these two concepts are somehow the same thing in the minds of a pilot-turned-handler and woe upon the pilot they manage.
Not sure if Valkyrie Corp mercenaries tend towards being female, but it is funny to consider that Penis King never had a penis as a human either. It just took that call sign because it likes killing people and the Penis King call sign is very attention-grabbing.
Call signs working under "you can kill people to take their call sign" is possibly the worst way to handle call signs without invoking 300 levels of paperwork hell, but mercenaries are always looking for an excuse to destroy rivals like bored Napoleonic Frenchmen craving sword duels.
Some handlers don't like risking their pilots and their expensive mechs for no money in fights over call signs and try to avoid their pilot hearing about duelling challenges.
Other handlers consider it a good way to practice real combat when in-between contracts and argue that having a hella good call sign makes it easier to get mentioned specifically when a mercenary corp is called up for a job. A client is going to be a lot more excited when someone with a badass reputation can be sent in compared to a fresh newbie trapped in hell with an idiotic call sign like Doofus.
Penis King is one of the top earners at Valkyrie Corp which is why the company puts up with its eccentricities including being a slightly illegal transhumanist. Lawyers have been in arguments for decades over whether or not a human brain upload counts as human still and it's a legal gray area. Penis King doesn't really care about money and doing taxes as long as Valkyrie Corp keeps its mech in good condition and securing contracts because it loves nothing besides deadly combat.
Kaczka has the call sign Duck because she often goes on sorties with Penis King and they are P.King and Duck on the company leaderboard. Kaczka also means "duck" and you ought to get out of her way when she comes barrelling in.
Kaczka doesn't get into many fights for her call sign since it sounds kind of stupid (she will beat the crap out of you if you make a "Sitting Duck" joke) and Penis King tends to absorb the attention, but she still has a strong reputation due to being a more than competent wingwoman.
Penis King has attachments for walking about when not on a mission, but it prefers being carried by Kaczka.