Lieutenant Commander Gruhn Helkara was a Zakdorn male serving in Starfleet in the late 24th century. By 2381, Helkara was serving as Chief Science Officer and second officer on the USS Aventine. (ST - Destiny novel: Gods of Night)

When the Aventine responded to a distress call from the USS Enterprise-E in the Azure Nebula during the Borg Invasion of 2381, Helkara came up with the idea to utilize a super-low frequency subspace band break through the Borg's subspace communication jamming, an idea that was frequently used by the Klingon Defense Force. He then had to reconfigure their sensors to operate in tandem with the Enterprise, as their targeting computer was offline. After the two vessels began scouting the subspace tunnels emanating from the nebula, one of the tunnels terminated near the Carina Arm where both ships were attacked and boarded by Hirogen hunters. To prevent computer access, Helkara was ordered by Captain Ezri Dax to lock down the engineering computer core. The ships were successful in repelling their boarders, and as they returned to the nebula, Helkara noted the collapse of the tunnels as they passed through, closing behind them. (ST - Destiny novel: Mere Mortals)

After the USS Titan appeared at the Azure Nebula, the Aventine crew was introduced to former Earth Starfleet Captain Erika Hernandez. Helkara was assigned to escort Hernandez around the Aventine, including down to Main Engineering to meet Chief Engineer Mikaela Leishman. En route, they passed various security officers preparing to board and capture a Borg scout, and found their confidence curious. Helkara attempted to explain the technical workings of the TR-116 rifle, but little of it made sense to Hernandez. Down in Engineering, Helkara introduced Erika to Leishman, and agreed to speak to Captain Dax and request that Erika personally pilot the craft when they began their assault.

Once they had arrived at the Borg vessel and disabled its weapons and engines, Helkara activated the dampening field; he lowered it once the appropriate signal was detected - pulses of plasma emitted from the craft in a Fibonacci sequence. With the scout craft believed secure, Helkara, Leishman, and Hernandez beamed aboard to hook Erika to the craft's vinculum. Their progress was slow, and Helkara argued against Hernandez's suggestion to remove the feedback buffer, but Dax overruled him. Hernandez was able to connect to the Collective and temporarily take over, but the Borg Queen transferred her presence to the vessel and reestablished dominance. Utilizing the craft, the Queen attacked the remaining officers, but Hernandez was able to counter the vessel's attacks and get Leishman, Helkara, and Kedair out safely. (ST - Destiny novel: Lost Souls)

USS Aventine personnel
UFP seal AltossS. BowersCh'MarasE. ConstantinoCupelliL. D'OdoricoN. DarrowE. DaxDexarEnglehornL. GlauS. GredenkoG. HelkaraHockneyT. KandelL. KedairN. K. TorC. KomerL'KemM. LeishmanLoskywitzMalayaO. MavroidisO. MirrenG. chim NakNavokP7-RedIlar P.RavosusN. RiordanP. RhysSelidokSimmerithT'PrelM. TakagiS. TarsesTharpTovakYlacamYott Starfleet Command logo
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