Renie used to enjoy deceiving Fisher, but her intentions were different; Renie did it to protect and tease herself, without causing potential harm to others.
If Renie's lies are like colorful bubbles hovering around you, ready to burst at a touch, then Helair's lies might be like a Schwali high-yield bomb hanging on you, ready to blow everyone else around you sky-high at the slightest move...
Moreover, he already had Elizabeth as a cautionary tale, which left him somewhat disappointed in the trust he previously placed in her.
At least back then, when he plunged into the Sea of Chaos to save Helair at all costs, he was unconcerned with rewards, yet his efforts were returned only with unspoken deception.
This left him somewhat downhearted, but only somewhat; aside from his inner thoughts, he didn't show it, only inadvertently exuding a slight low-pressure hinting to everyone "I'm in a bad mood".
