In Chainsaw Man Part 2, the emphasis is no longer on Denji fighting but rather on the more complex, dark wars between devils, fiends, and identity. Yoru, the War Devil, is now a cohabitant with Asa Mitaka and creates a different manner of contract that regulates her strength and authority. This contract is also the key to her desires, constraints, and the way she opposes the previous domination of Makima.
Yoru has a more sinister contract than Makima in Chainsaw Man Part 2. It involves more mechanics and implications of control of a human host, guilt as power, and forced domination of others in a manner that blurs autonomy.

The Contract of Makima - the Control Devil - allowed her to bully human beings into binding contracts and seize armies of weapons and even execute her contractors by default when they do not comply. Her contract was all-encompassing, brutal, and manipulative. Her contract was based on fear and obedience. However, the contract that Yoru has is more intimate, savage, and intrusive - it directly concerns the occupation of the human mind (Asa), deployment of guilt, and the use of flesh arms, and the relationship is more violent than the distant control Makima has.
The Sinister Nature of Chainsaw Man’s New Contract
The type of contract that Makima used in Chainsaw Man was distant dominance: Makima dominates contractors, but primarily outside. Yoru has a more intimate possession contract with half of her brain being in Asa. Yoru does not merely give orders in Chainsaw Man, but lives inside, shutting out Asa mentally and forcefully occupying her when she stumbles. The psychological brutality of the influence exerted by Yoru is more internal, both mental and physical, compared with the more external manipulations of Makima.
Due to the nature of the contract, Yoru becomes powerful with the help of guilt, using the elements of the relations and feelings of Asa. The extent to which she can turn flesh into weapons is determined by the degree of guilt or emotional burden on the target. The greater the guilt, the greater the weapon. This is a contractual move that is chilling: emotional and moral trauma are sources of power. The contracts made by Makima are based on dominance, and those made by Yoru use internal scars and coercion as sources of power. The idea of guilt as power is not reflected within the contract of Makima.

Makima might forcibly kill or resurrect her contractors, but seldom intruded directly into their mental space. Yoru, however, literally replaces the brain of Asa - it requires the fear of Asa to stay in control. Asa is in a state of fear, Yoru takes full control; Asa struggles, Yoru gives way. It is not a stable ownership but an untamed tug-of-war, and more volatile, dangerous, and invasive than the regime of Makima.
The agreement of Makima in Chainsaw Man was so dreadful that she was feared by many due to her long arm. The contract by Yoru is frightening in a personal sense: it goes directly to the selfhood of Asa. It is not so much an order to follow me, but an order to stop existing in your own mind. No clean division or way out.

In addition, the contract of Yoru in Chainsaw Man enables her to turn living things into flesh weapons. She is literally able to weaponize human beings, Devils, or even her own host body. Makima did not physically mutilate her contractors to that extent; she had power, not dismemberment. The physical horror and brutality of the contract that Yoru takes is more horrifying than the psychological horror of Makima.
The contract also has contract triggers: e.g., Yoru may invoke external contracts (such as the pact with the Gun Devil) to weaponize objects and structures through her dominance of Asa's body. So her contract is overlaid with rights to override and enslave external systems, not only Asa. The scope of Makima was restricted to her direct contract list.
Lastly, the agreement Yoru has is coercive in nature: she threatens to kill Asa should she disobey, but does not kill her, merely using the host as a weapon. Makima, the contract was also coercive, less actively related to bodily violation. The contrast kill your contractor or rule them is typical; the annihilation of identity threat is added by Yoru.
Yoru in Part 2 Chainsaw Man has a new contract that is a more diabolical one than Makima because of its close hold, guilt-based authority, conversion of her body, and psychological intrusion into the self of Asa. However, whereas Makima controlled with awe and magnitude, Yoru controls, weaponizes, and replaces identity with a more monstrous and inside-out approach.