10 'Helpful' Companions That Actually Make The Game HARDER
Good friends stick by you, the bad ones would be doing you a favor if they didn't.

Video game companions are meant to aid you on your adventures. They're there to support you every step of the way, making life easier for you.
Except for some of them, that is.
It turns out, every once in a while you may stumble upon a companion who, instead of helping you, does everything within their power to make things harder for you.
Whether intentionally or not, these "special" companions are programmed to hinder you in some way, be it by giving you negative stats, messing with your abilities, or doing something that makes it more difficult to play.
They might appear to have good intentions, but in reality, allowing these followers to join you is the first step towards your doom. After you sign them on, it won't be long until you regret this decision when they finally show you why no one really likes them.
If you come across the following characters in your game, you've been warned. Asking them to accompany you will make you miserable, so it's best to keep them as far away from you as possible.
10. Illia - The Elder Scrolls V: Skyrim

The companions in Skyrim are mostly used for hauling your excess dragon bones around, but they can also prove to be a lifesaver in difficult battles when you're low on health and need someone to distract the enemy while you run off to heal.
Unless you're traveling with Illia, in which case your companion is about as dangerous as the enemy.
Illia is a unique mage companion that the player can recruit by completing the mission "Repentance."
On paper, Illia sounds like an incredible follower. She is an expert spellcaster who has access to high-tier ice spells like Ice Storm, which allow her to deal huge amounts of damage to multiple enemies at once.
However, because there's no protection against friendly fire in the game, the same spell is just as deadly to you.
Illia doesn't really care about aiming her burst of ice away from you. Instead, she'll hurl it into whatever place has the most enemies, and since that usually means the spot where you're fighting them, you're pretty much guaranteed to be caught in it as well and die to the ludicrous amounts of cold damage it deals.
She might be effective at killing your foes, but you won't be around to witness it.